Set in the year 2166, the immortal villain Vandal Savage is on the verge of destroying humanity; Rip Hunter travels back in time to assemble a team of heroes and rogues to stop Vandal Savage.

When a piece of Atom's suit falls into the wrong hands during a massive fight, professor Stein decides to turn to someone brilliant for help -- his younger self; Carter helps Kendra recover an important memory.

Rip decides to weaken Vandal Savage by going after his financial assets. Rip and Sara infiltrate Savage's bank, but are discovered by his men. Meanwhile, Snart and Rory talk Jax into taking the jump ship back to Central City so they can steal a valuable emerald. Professor Stein guides Ray on a dangerous mission.

When Vandal Savage retreats behind the Iron Curtain in the early 1980s, a string of nuclear scientists begins to mysteriously disappear. The team follows Vandal's trail straight into the heart of the Soviet Union in an attempt to find his next target. Ray tries to bond with a beautiful Soviet scientist, Valentina Vostok (guest star STEPHANIE CORNELIUSSEN), in the hopes of finding out Vandal's next move. When Valentina rejects him, however, it's Snart to the rescue. Stein pushes Jax to be better, which frustrates Jax and ultimately threatens the Firestorm matrix. Rip asks Sara to train Kendra.

After some of the Legends are captured and thrown into a Russian gulag during the height of the Cold War of 1986, Snart leads the team in an elaborate escape plan to free their comrades. However, Rip gives Sara a secret side-mission that could prove not only to be a liability, but fatal to the team.

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 (guest star STEPHEN AMELL).