The fifth season of the American television series Legends of Tomorrow, which is based on characters from DC Comics, premiered on The CW on January 21, 2020.

The season was produced by Berlanti Productions, Warner Bros. Television, and DC Entertainment, with Phil Klemmer and Keto Shimizu serving as showrunners.

Principal cast members Brandon Routh, Caity Lotz, Maisie Richardson-Sellers, Tala Ashe, Jes Macallan, Courtney Ford, Amy Louise Pemberton, Nick Zano, Dominic Purcell and Matt Ryan return from previous seasons, while Olivia Swann was promoted to the main cast from her guest status in season four.

While J'onn J'onzz uses his psionic powers to restore their allies' memories, Sara Lance attempts to find Oliver, though without success.

To stop him once and for all, Nash, Ray Palmer, Barry Allen, and Ryan Choi work to develop a bomb to shrink the Anti-Monitor for eternity while the other heroes distract him.

[37] The fourth season ended with Astra Logue restoring many notorious historical figures like Genghis Khan, Joseph Stalin and Charles Manson to life.

Klemmer said these characters would be called "Encores" and have the villain of the week treatment, while the Big Bad of the season would not be demon-related,[37] later revealed to be Lachesis and Atropos of the three Fates.

[40] Main cast members Brandon Routh, Caity Lotz, Maisie Richardson-Sellers, Tala Ashe, Jes Macallan, Amy Louise Pemberton, Courtney Ford, Nick Zano, Dominic Purcell and Matt Ryan return as Ray Palmer,[26] Sara Lance,[18] Charlie,[19] Zari Tomaz,[37] Ava Sharpe,[21] Gideon,[24] Nora Darhk,[22] Nate Heywood, Mick Rory,[26] and John Constantine respectively.