Charlie's plan backfires when he attempts to remedy his group with sleep-deprivation therapy.

Charlie gets an unexpected visit from his hyper-critical, bullying father. In the therapy group, Charlie attempts to help Lacey with road rage.

After Charlie and Kate have sex, he innocently asks her if she wants to go to a movie. Kate interprets this as a romantic gesture, rushes to fix him up on a date the next day with someone else and the two are forced to exam the nature of their odd relationship. At home, Sam kisses a girl at school and a picture of it ends up on Facebook.

Charlie's dad falls in with a bad crowd.

Charlie dates his daughter's teacher.

Lindsay Lohan comes to Charlie for therapy and they begin a tumultuous relationship.

Charlie's neighborhood is up in arms when they find out he's been having clients with anger issues meeting at his home.

Charlie takes the group on an equine therapy retreat.

Charlie gets jealous and uses a patient to spy on Kate.

Charlie shakes up his relationship with Kate while dealing with the return of Jen's ex-boyfriend.

Charlie suspects Jen's boyfriend, Sean, is cheating on her with his patient, Lacey. Also, Nolan's apartment gets robbed.

Charlie mistakenly becomes a sex surrogate for one of Kate's patients, who is a thirty-two-year-old virgin.

Charlie and Kate are ready to sleep with the right people to get funding for their sex study.

Charlie invites Ellie (Brea Grant), an attractive grad-student, to observe a therapy session only to have to compete with Nolan for her affection. Meanwhile, Ed and Martin come up with a plan to scam the government by hosting a disabled war veteran in their house.

Charlie is forced to hire a new psychologist to replace Kate in his sex study; Jennifer and Lacey trick Sean.

Charlie is pursued by a hot reporter who wants to experience his sex study.

Charlie gets Jordan to pose as his prison patient's fiancé.

Charlie's Christmas plans with Sasha are derailed when Ed steals the baby Jesus from a Latino church.

Charlie seeks his prison group's help when his partying ways result in him getting arrested.

Charlie convinces Jordan to pose as the fiance'e of a member of his prison group, and Lacey and Patrick gamble away part of Lacey's parents' money.

Jordan's twin sister, identical in every way except hair color and the addition of fake boobs, is in town. Jordan tells Charlie that the two don't get along ever since her sister slept with her former fiancee. She asks Charlie to help mend the damage between them, but he winds up sleeping with the twin. Elsewhere, Lacey's sister blackmails her into buying her whatever she wants in exchange for not revealing to their parents that the marriage to Patrick is a sham.

When Charlie's best party buddy becomes a priest; Charlie's tries to tempt him with women and liquor.

Charlie falls for the sexy daughter of his father's warring neighbor.

Charlie is inspired to start a new clinic at the prison after Jordan wrecks their sex study.

When Charlie keeps choosing sex over work, Jordan convinces his girlfriend, Sasha, to cut him off for six months.

Charlie goes ballistic when a drunk Jordan makes out with a prisoner.

Charlie spends the night with Lacey to keep her from killing her ex-boyfriend.

Charlie surprises his therapy group by bringing their dysfunctional parents to a session.

Sean tells Charlie not to have sex with his visiting sister, and Patrick and Lacey discover that they are dating the same man.

Problems arise after Charlie has a threesome with his girlfriend and one of her friends, and Lacey uses Jordan's help to try and sell her eggs.

Charlie gets Sean fired from the strip club when he sleeps with a stripper.

Charlie makes a promise to an attractive reporter; it involves an interview with an extremely furious convict.

Charlie and Jordan have to share a hotel room to expose a shady couple's therapist.

Charlie sets up Sean with a hottie even though he knows Sean is seeing Jordan.

Charlie gets in hot water with his prison group when he sleeps with the attractive new warden.

Charlie inadvertently helps a member of his prison group in an escape attempt.

Charlie struggles to control his anger after meeting a hot girl who doesn't date angry guys.

Charlie goes to war with his garbage man.

Charlie becomes paranoid after discovering he's dating a private investigator.

Charlie falls into trap when Jordan sets him up with a heartbreaker.

Charlie finds himself in a contest with a female private investigator to prove that he could cheat on her without getting caught.

Charlie's life is taken hostage by a controlling techy girl.

Charlie creates a monster when he helps Nolan unleash his anger.

Charlie tries to help Patrick through a crisis of confidence by getting him stoned.

When Charlie tricks Lacey into believing her father is broke, she gets engaged to an obnoxious billionaire. Meanwhile Nolan makes a business arrangement with Sean's strip club.

Charlie almost destroys Ed's marriage; Jordan hits on Nolan.

Charlie goes to Vegas and life gets complicated after a night of heavy drinking.

Charlie risks his life to sleep with a thrill-seeker.

Charlie wants to make a business deal with Jordan's ex-husband, but he knows Jordan won't go along if she knows the identity of the business partner. Meanwhile, Lacey gets jealous when Nolan tries to save a family of birds.

Charlie becomes trapped in a wild dream where he can't distinguish between what's real and what's not.

A matchmaker sets up Charlie and Sean with the wrong dates.

Charlie interferes with Lacey and Nolan's love life and gets Nolan kidnapped by prisoners.

Charlie's father sets him up with a hot, but quiet Catholic girl who turns out to be too wild, even for Charlie.

Charlie and Jordan hire a hot tie-breaker to work as their associate on the prison clinic program.

Charlie has to make a decision between keeping his group and being a sports psychologist for a baseball team.