Evan Davis hosts the business ideas challenge, which sees vitamin company CEO Tej Lalvani and cash machine tycoon Jenny Campbell joining returning Dragons Deborah Meaden, Peter Jones and Touker Suleyman to cast an eye over more money-making schemes - with the largest investments in the show's history up for grabs. The first batch of entrepreneurs braving the den present their ideas for an allergy-friendly food range, astroturf for schools and youth centres, and a voucher code website that could revolutionise online shopping.

Tonight it is all about the duos. Two brothers pitch their venture making furniture from old aeroplane parts, a business couple are hoping for investment in their book buying and selling concern and a husband-and-wife team enter the Den with organic dog treats they are hoping are best in show. Finally, two fitness enthusiasts face the multimillionaires with their healthy snacks business, but after a tough workout in the Den will they leave with any Dragon cash?

Bucharest-born Alex hopes his personalised range of luxury leather bags will be the complete package for the Dragons. An ex-policewoman attempts to work up the Dragons' appetite with her range of free from, allergy-friendly frozen curries. And Dorset-based inventor Michael thinks he can ignite the interest of the Dragons with a gadget that keeps opened champagne fizzing. Will his pitch sparkle in the Den or will it fall flat?

Stepping out of the lift doors tonight are former bankers Ben and Andy, whose passion for travel inspired them to kick start their beach towel business. A duo with 40 years of friendship behind them think they have a winning idea with their unique packaging concept all based on air. And finally a serial entrepreneur pitches her family-run novelty plush goods business - but will it be a soft landing when the business goes under scrutiny of the Dragons?

Deborah Meaden, Peter Jones, Touker Suleyman, Tej Lalvani and Jenny Campbell assess the profit-making potential of a space age business venture created by two scientists, an African-inspired range of skincare products, and an online pub quiz app created by a Leeds-based entrepreneur. Evan Davis presents.

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Deborah Meaden, Peter Jones, Touker Suleyman, Tej Lalvani and Jenny Campbell assess the profit-making potential of more business schemes, including an eco mannequin company, a brand of cork-based yoga mats, and a cycling navigation device. Presented by Evan Davis.

Peter Jones, Deborah Meaden, Touker Suleyman, Jenny Campbell and Tej Lalvani take their seats to face the latest batch of entrepreneurs who dare to enter the Den. This week, an athletic entrepreneur hopes he will be in the running for a cash boost for his protein shaker bottle. An engineer from Essex is looking for investment in his home sensor system for the elderly. Finally an Antipodean businesswoman hopes to tempt the Dragons into investing in her gluten-free cakes business. But will anyone walk away with the hoped-for cash?

Will it be the season of goodwill as Peter Jones, Deborah Meaden, Touker Suleyman, Jenny Campbell and Tej Lalvani take their seats to face the latest batch of entrepreneurs who dare to enter Dragons' Den? In this Christmas episode, a serial entrepreneur pitches his online greeting card business, a Surrey-based inventor is hoping his word game could become a family Christmas favourite, and a duo bring their healthy breakfast and snacking products to the Den in the hope of some warm festive cheer. Finally, three brothers pitch for a stake in their men's grooming products - will the Dragons see it as the perfect stocking filler and make a bid for the business?

A former bricklayer is hoping his mortar board invention will help him to build a lucrative relationship with a Dragon, a mother of two enters the Den with a children's tracker device, and an entrepreneur pitches crisps inspired by astronauts. Finally, a 25-year-old brings a Paralympian to the Den to demo her product designed for wheelchair users. But will it be enough to win her an investment?

The Dragons get a good dose of healthy products for man and beast. A business duo hope to stand out from the crowd with their natural raw dog food, a doctor pitches his innovative date-based smoothie and a London entrepreneur wants to get the Dragons' hearts pumping with his unique free-running exercise regime. But will the adrenalin rush leave the Dragons fighting to invest?

In this episode, three dynamic duos make an entrance. First up a female entrepreneurial pair pitch their nifty solution to pain caused from wearing halter neck straps. Another team of two make an impact with their innovative skin care products made from hemp. And a couple of entrepreneurs hope to seal a deal with their language learning story books for kids. But who will walk away with some Dragon cash?

Jenny Campbell, Peter Jones, Touker Suleyman, Deborah Meaden and Tej Lalvani assess the profit-making potential of a young entrepreneur's plan for selling advertising space on the move, a teacher's unusual scheme for improving children's handwriting, and a range of chain-tensioning products for motorcycles.

Deborah Meaden, Peter Jones, Touker Suleyman, Tej Lalvani and Jenny Campbell assess the profit-making potential of a final batch of business plans, including an idea for a child's toothbrush that doubles as a mobile game controller, a range of Scottish gins, and a device for relieving back pain. Last in the series.

Entrepreneurs Deborah Meaden, Peter Jones, Touker Suleyman, Tej Lalvani and Jenny Campbell assess more unusual business ideas, including a shocking display from the owner of a live anatomy dissection business and a new model of tuk-tuk that turns out to have a fatal flaw. The final presentation is for a singer-for-hire scheme, which prompts the panel to show off their own musical talents.

Entrepreneurs Deborah Meaden, Peter Jones, Touker Suleyman, Tej Lalvani and Jenny Campbell assess the profit-making potential of a father and son team's colourful wetsuits, two former politicians with ideas about alternative energy, a couple's African coffee ceremony business, and a fake tan product with a creator who has already braved the Irish version of the show.

Peter Jones, Deborah Meaden, Touker Suleyman, Jenny Campbell and Tej Lalvani assess the profit-making potential of more business ideas, including a keen fisherman with a plan to market his own range of bait, a pasta home delivery service, and a brother and sister with a scheme to make money out of rubbish. Evan Davis presents.

Self-made millionaires Peter Jones, Deborah Meaden, Touker Suleyman, Jenny Campbell and Tej Lalvani assess the profit-making potential of more would-be entrepreneurs' ideas, including a doctor who has invented a range of convertible clothing, a team of university friends with an online art platform, and a pair of hairdressers with a colour wash shampoo business.

Peter Jones, Deborah Meaden, Touker Suleyman, Jenny Campbell and Tej Lalvani assess the profit-making potential of three more business plans, including a brand of gourmet cheesecakes, a company offering drones for hire and a blend of alcohol and beauty products involving collagen-infused gin. Presented by Evan Davis.

An inventor with a passion for pets hopes Peter Jones, Deborah Meaden, Touker Suleyman, Jenny Campbell and Tej Lalvani will appreciate his cat whistle, while an ice-cream entrepreneur plans to tempt the multi-millionaires to invest in her coconut-based desserts. Plus, a carpenter brings the outside indoors for some fun and games.

Peter Jones, Deborah Meaden, Touker Suleyman, Jenny Campbell and Tej Lalvani assess the profit-making potential of more business ideas. Up for consideration are a mother and son's range of spicy street food, a range of cocktails, and a former teacher's plan for a new system to mark students' schoolwork. Presented by Evan Davis.

Peter Jones, Deborah Meaden, Touker Suleyman, Jenny Campbell and Tej Lalvani assess the profit-making potential of ideas for flour-free bread and hair extension storage, as well as an online business proposition from would-be entrepreneurs in the US. Presented by Evan Davis.

Peter Jones, Deborah Meaden, Touker Suleyman, Jenny Campbell and Tej Lalvani assess the profit-making potential of three more business ideas. This week's would-be entrepreneurs are pitching a range of green tea, a bathroom construction invention that could revolutionise the building trade, and a new type of snack.

Peter Jones, Deborah Meaden, Touker Suleyman, Jenny Campbell and Tej Lalvani assess the profit-making potential of a range of vegan drinks and chocolates and a condiment brand created by a visitor from Texas. Plus, two motoring enthusiasts have a business scheme in mind that offers big prizes to the consumer and potentially big profits for the investors.

A festive edition of the business ideas contest, with Peter Jones, Deborah Meaden, Touker Suleyman, Jenny Campbell and Tej Lalvani assessing the profit-making potential of ideas perfect for the Christmas season. An inventor introduces his innovative new form of Christmas tree stand, while other entrepreneurs pitch their ideas for a range of sweets and a puzzling family game. Finally, the creator of a personalised comic-book realises he must make a big personal decision if he is to secure funding.

Entrepreneurs make the pitch of their lives. A husband-and-wife team hope to toast success with a whisky-themed idea.

Peter Jones, Deborah Meaden, Touker Suleyman, Jenny Campbell and Tej Lalvani test the profit-making potential of more business ideas. A Yorkshire chef showcases a range of bespoke pastries, a Dutch designer pitches a brand of eco-friendly furniture, and an entrepreneurial duo seek investment in their artisanal craft gin.

A trio of cyclists present their idea for a bike taxi service, a former dentistry student introduces a range of children's toothbrushes, and two combat experts look for funding for a new kind of protein snack bar.

Peter Jones, Deborah Meaden, Touker Suleyman, Jenny Campbell and Tej Lalvani assess the profit-making potential of more business ideas, including an eco-friendly range of body and skincare products, a divisive savoury snack, and a brand of fruit-flavoured water.

A pair of porridge entrepreneurs invite the Dragons to a teddy bears’ picnic and academic traditions are turned on their head by two graduates who are determined to disrupt an established marketplace.

The Dragons assess the profit-making potential of an eco-friendly entrepreneur's alternative to straws, a range of skincare products, a device designed to make bikes more visible, and a brand of food with a personal story behind it. Evan Davis presents.

Former Dragon Theo Paphitis returns to the panel to stand in for Touker Suleyman, joining Sara Davies, Peter Jones, Deborah Meaden and Tej Lalvani in assessing more business ideas. This week's entrepreneurs pitch their ideas for a diet app, a clothes-mending workshop, a gadget for repairing bicycle chains, and a range of dog treats.

The panel oversee more business propositions, with returning Dragon Theo Paphitis joining regulars Peter Jones, Deborah Meaden, Tej Lalvani and Sara Davies. Two entrepreneurs seeking funding for a range of drinks go to the lengths of setting up a bar in the studio, while other items up for assessment include a design for a pipe-fitting tool and a range of men's cosmetics.

More plucky entrepreneurs prepare to enter the Den, but it won’t be easy to impress feisty multimillionaires Peter Jones, Deborah Meaden, Tej Lalvani, Sara Davies and former Dragon Theo Paphitis, who is standing in for Touker Suleyman. Those ready to brave the heat of the Den include a Scottish sauerkraut enthusiast who wants to balance the Dragons’ gut bacteria as well as boosting the health of her business. The investors also listen out for the opportunities offered by a new breed of phone alarm app, and one entrepreneur thinks he has the solution to post-festival waste.

Only the bravest business people dare to set foot in the Den, where multimillionaire investors Peter Jones, Deborah Meaden, Tej Lalvani and Sara Davies breathe fire. Joining them is Theo Paphitis, who is standing in for Touker Suleyman for the last time this series. A Yorkshire shepherd and his business partner hope the Dragons will flock to invest in their field-to-fork lamb delivery boxes. An inclusive fashion designer brings a little street style to the Den, and a confectionery pioneer hopes to bag a sweet Dragon deal with his low sugar, dairy-free chocolate. But will their pitches make the Dragons bite or fight?

Crafting queen Sara Davies, joins Peter Jones, Deborah Meaden, Touker Suleyman and Tej Lalvani. In this episode, a spiced rum entrepreneur gets the party started with a rock 'n' roll makeover.

Dragons' Den is back with a positively festive feel. But seasonal goodwill is no guarantee of success for a new batch of entrepreneurs facing fiery multimillionaires Sara Davies, Touker Suleyman, Deborah Meaden, Tej Lalvani and Peter Jones.

An eco-friendly gift wrap business gets a helping hand from Santa, while a sock entrepreneur embodies the holiday spirit with his buy-one give-one business model. And a pair of candle entrepreneurs try to convince the Dragons that their products can spark some serious profit. But while all the ho-ho-hopefuls dream of Dragon cash for Christmas, these investors don't give the gift of investment unless a business has real sparkle.

Tonight’s hopefuls include a beauty entrepreneur whose tools have a social as well as practical purpose and two low-alcohol brewers who hope the Dragons will stump up for the ultimate round of investment. And the multimillionaires try more than a business on for size when a footwear entrepreneur pitches his range of hand-finished shoes. Will he leave the Den walking on air?

Tonight, a colourful hair entrepreneur offers one Dragon a new look - and all of them a new investment opportunity. A cheesecake maker has sweet dreams of a cash boost for his franchise model, but will his pitch be the stuff of nightmares? And a husband-and-wife team hope their electrical invention will make sparks fly in the Den as rival Dragons Deborah Meaden and Sara Davies line up to try it out.

Tonight, an inventor tries to recruit the Dragons for his war on household draughts, and a micro-businessman introduces the investors to the idea that dogs eating bugs could be a good (and profitable) thing. There is a shimmying session with a fitness teacher, and the creator of a high-end garment bag demonstrates an unshakeable belief in the value of his business.

Syrian refugees Razan and Raghid Sandouk bring their British-made alternative to Cypriot halloumi to the Den, but will the Dragons think it is a tasty proposition? Breezing into the Den are partners in business and life Richard and Samantha, with their cutting-edge virus filtration gadgets. And Joe Metcalfe is hoping for a hand out from the Dragons with his charity-meets-commerce clothing business. Can he convince the Dragons that pre-loved can be profitable?

A German-Portuguese business combo have their business, which makes camera lenses for mobile phones, brought into sharp focus, but will they be in the frame for investment?

Entrepreneurs face the fiercest line-up in business. Syrian refugees Razan and Raghid Sandouk bring their British-made alternative to Cypriot halloumi to the Den.

A husband-and-wife team put the needs of NHS workers at the heart of their skin-care business, but will their altruistic approach go down well?

Products pitched to the Dragons this time include organic superfood powders, a low-calorie craft lager, a plaque-detecting dental app and a range of afro and curly hair products.

Featuring the inventor of a nifty construction bracket, a tech entrepreneur with a fitness app aimed solely at women, and a Scottish dog lover with a range of natural doggie treats.

A 29-year-old tech enthusiast is confident that his clever way of monetising people's personal online data will spark interest with the Dragons.

A pitch for a music-sharing app is brought down to earth, the Dragons interrogate an idea for an ethical clothing verification platform, and there's an emotion tale behind a range of active shapewear.

A plucky entrepreneur pitches an idea for genetically personalised meal shakes, and the Dragons are put to the test by the founders of a virtual escape-room business.

Pitches include a premium whisky subscription business, an easy-assemble lighting system and a clever sand-removing powder.

Entrepreneurs pitch plantable children's books, an at-home private chef service, luxury home fragrances and scent-detection courses for dogs.

A London-based entrepreneur pitches an assortment of naturally derived sugar alternatives, hoping the response to his proposition will be just as sweet.

There’s an explosive start to a pitch when a father and daughter duo demonstrate their airbag safety equipment, and a couple pitch their anti-roll changing mat for babies.

Pitches include a selection of premium spiced rums, a nursing bra designed to help mothers and babies breastfeed effectively, and a heatless hair-curling device.

Hoping to strike a deal tonight are the musical inventor of a drumming training device and an LA-born entrepreneur with a culinary alcohol product range.

A a pair of optometrists hope the Dragons will see a bright future in their blue-light filtering products, and an eco-entrepreneur pitches a carbon-offset trading app.

In the series finale, products pitched to the Dragons include online hypno-birthing platforms, a unique building system, a plant-based chewing gum and bespoke ring-making kits.