When a malfunction sends the Waverider crashing into 2046 Star City, our heroes face a startling version of their own future where they never stop Savage and never return home. The city is in ruins and overrun by criminals, which thrills Rory. Sara is despondent over the destruction of her home and stunned when she learns what happened to her old friend, Oliver Queen.

Rip takes the team to London in the year 2166, three months before his family is killed. He believes this to be their final opportunity to take out Savage who is, unfortunately, at the height of his power. However, the team discovers two key elements to defeating him – Savage’s daughter and the means to kill Savage once and for all.

The Legends discover a time aberration in 1863 and must fight for survival during the Civil War with Confederate soldiers who have been turned into zombies. With the Civil War outcome hanging in the balance, Jax participates in a daring mission by going to a slave plantation with Amaya. Meanwhile, Sara begins to feel the burden of the decisions she has to make as the leader; and Ray struggles to find his purpose on the team.

When a new Time Aberration is discovered by the Legends, they find themselves headed to 1927 Chicago. The Legends quickly realize that they have been set up by Eobard Thawne, Damien Darhk and the newest member of the Legion of Doom, Malcolm Merlyn. While everyone is trying to help fix what they think is the mission, Jax encourages a reluctant Stein to share his secret with the other Legends. Stein is taken captive and Sara must make the tough choice of either stopping the Legion of Doom or saving Stein. Meanwhile, Rory gets an unexpected visitor and is not sure how to handle it.

After capturing Rip, he forces the Waverider to crash, leaving the Legends stuck seventy million years in the past. Ray leads Amaya and Nate to recover a vital piece of the ship. In an effort to get the “good” Rip back, Rory suggests they enter Rip’s mind, but what Sara and Jax discover in his subconscious is not pleasant and they must fight evil versions of themselves. Meanwhile, Nate and Amaya continue to get closer, but it could cause serious ramifications.

The Legion of Doom rewrites history after obtaining the Spear of Destiny, potentially changing the Legends forever.

When Sara receives a distress call from their "befriended" agent at the Time Bureau, she learns that they have been tasked with going to the future to capture a rogue time traveler. Unfortunately, the Legends make things worse by trying to protect an outlaw named Zari, to hopefully lure in the time traveling assassin. Meanwhile, Stein tries to diagnose Amaya's condition, but Nate discovers an unusual treatment that Amaya begrudgingly agrees to.

With Sara out of commission, the team finds a new Anachronism that leads them to the jungles of Vietnam and right in the middle of the war. Ray, Amaya and Zari pose as journalists and trek through the jungle when they are lead to time-displaced Gorilla Grodd. Meanwhile, Nate and Rory run into someone Rory knows which give a glimpse into his past.

After the team returns from a mission, Zari finds herself trapped in a time loop that results in the Waverider blowing up over and over again. Zari soon begins to suspect that the answer to stop what is happening might lie hidden among her fellow shipmates' secrets. But in investigating them she starts to understand her place on the team.

When Ava disappears, Sara and Ray set out to find her after some prodding from Time Bureau agent Gary and a disturbing truth about Ava. Amaya tasks Zari with helping train Rory in controlling his own Totem power. Meanwhile, Nate and Wally set out on a mission that goes awry when they pair with an unlikely person to try and get a Totem.

When the Legends discover that kids at a summer camp have disappeared, Sara, Ava, Ray and Constantine find themselves as the new camp counselors. At camp, Ava struggles to get along with the kids, but Constantine whips up a potion that helps Sara and Ava bond with the children. Luckily, the team finds clues to the whereabouts of the missing kids, but the battle to save them leaves one member in bad shape. Meanwhile, Rory and Zari are tasked with watching the fugitive and Rory finds a kindship with their "prisoner."

After Constantine breaks the cardinal Legend rule—you can’t change the past—he, along with Charlie and Zari try to deal with the ramifications without telling the rest of the Legends. Even though Zari encourages them to just fix the problem, Constantine and Charlie are determined to find another way, but only continue to make things worse.

With Constantine missing, the Legends struggle to find a way to track him. When Sara hesitates to make a tough call, Rory steps up creating a wedge in the team. Meanwhile, Ava gives Gary the responsibility of handling the Bureau performance reviews for all the Agents.

When a new blip lands the Legends in 1947 Los Angeles, it puts them on the trail of Benjamin “Bugsy” Siegel who seems to take pleasure in fraternizing with Hollywood Elite. Sara, Ray and Constantine devise a plan to capture him while Ava and Rory sit on the sidelines for the time being. They soon realize that they need to worry less about Bugsy and more about his girlfriend. Ava is struggling with being on the sidelines with Rory. Meanwhile, Nate accompanies Behrad to his dad’s birthday, where Nate meets Behrad’s sister, Zari, who seems familiar to him.

The Legends continue their hunt for pieces of the Loom of Fate and find themselves face to face with William Shakespeare. Ray, Nate, Rory, Constantine, Charlie and Behrad stay a little longer on the mission making things worse after lying to Sara. Meanwhile, Ray and Nora make another big life decision that leaves the team surprised and best buds, Nate and Ray, on the outs.

After drinking from Chalice, the Legends have immortality for 24 hours, which gives them time get to the Waverider and use the Loom of Fate. However, they quickly discover that the sisters have stolen the Waverider and they are stuck at Constantine’s house in the middle of nowhere in London during a Zombie Apocalypse. Meanwhile, Gary is left on the ship and once he discovers what is going on, he takes something important to the sisters.

With Astra now a mortal, she finds it hard to adapt to the real world with no guidance from Constantine. Frustrated and lonely, Astra makes a new friend who promises to help her, but her eagerness for the easy way out could have some real repercussions for those closest to her. Meanwhile, Sara meets the person responsible for her kidnapping and tries to convince others to help her escape.

When the Legends track down another Alien pod, they find a device that transports them to a cosmic bowling alley. Spooner makes a bet against the reigning champs for a ride back to the Waverider, but not everyone is happy about the plan when they realize what they are up against. Elsewhere, Nate plans a romantic date for him and Zari, but nothing goes as planned. Meanwhile, Behrad and Gary try to distract Ava from what's going on with wedding planning.

When Astra and Spooner find themselves as stowaways, they learn that Constantine is still chasing the Fountain of Imperium and find themselves in 1920s Texas. With the rest of the Legends stranded, they come up with a plan to get help by using Rory as bait that will also help reunite him with something that is special to him. Meanwhile, Spooner learns some information about her past that she wasn't expecting.

After defeating the aliens and saving Earth, the Legends find themselves stranded in 1925 Odessa, Texas with a destroyed Waverider. Wanting to help fix things, Astra tries using her powers, which creates unwanted attention from the town and that of the new Director of the Bureau of Investigation, J. Edgar Hoover. Realizing they need to escape, Sara and Ava create a distraction by going on a crime spree with Hoover hot on their tails. Meanwhile, Zari is finding it hard to get over Constantine, so Behrad suggests the only thing he knows that can help.

When the Legends and Gwyn finally time travel, the time machine goes haywire leaving them stranded in a lush forest with no idea when or where they are. Seeing that Sara and Ava are noticeably stressed, Nate takes over and gives everyone tasks to set up camp to keep everyone occupied. Meanwhile, unbeknownst to the Legends, someone keeps trying to destroy the anomalies that keep popping up which could create bigger ripples throughout history.