Season 3 (DC's Legends of Tomorrow)

DC's Legends of Tomorrow was renewed for a third season by The CW on January 8, 2017. It premiered on October 10, 2017. It takes place in conjunction with the fourth season of The Flash, the third season of Supergirl, and the sixth season of Arrow.

Main cast

 * Victor Garber as Professor Martin Stein/Firestorm and Sir Henry Stein
 * Brandon Routh as Dr. Ray Palmer/The Atom
 * Caity Lotz as Captain Sara Lance/White Canary
 * Franz Drameh as Jefferson "Jax" Jackson/Firestorm
 * Maisie Richardson-Sellers as Amaya Jiwe/Vixen
 * Amy Louise Pemberton as Gideon
 * Tala Ashe as Zari Tomaz
 * Nick Zano as Dr. Nate Heywood/Steel
 * Dominic Purcell as Mick Rory/Heat Wave

Recurring cast

 * Arthur Darvill as Director Rip Hunter
 * Jes Macallan as Agent Ava Sharpe
 * Hiro Kanagawa as Director Wilbur Bennett
 * Adam Tsekhman as Agent Gary Green
 * Christina Brucato as Dr. Lily Stein
 * Tracy Ifeachor as Kuasa
 * Courtney Ford as Nora Darhk
 * TBA as Mallus
 * John Noble as Mallus (voice; uncredited)
 * Neal McDonough as Damien Darhk
 * Wentworth Miller as Leonard Snart/Captain Cold and Citizen Cold
 * Matt Ryan as John Constantine

Synopsis
"After the defeat of Eobard Thawne and his equally nefarious Legion of Doom, the Legends face a new threat created by their actions at the end of last season. In revisiting a moment in time that they had already participated in, they have essentially fractured the timeline and created anachronisms – a scattering of people, animals, and objects all across time! Our team must find a way to return all the anachronisms to their original timelines before the time stream falls apart. But before our Legends can jump back into action, Rip Hunter and his newly established Time Bureau call their methods into question. With the Time Bureau effectively the new sheriffs in town, the Legends disband – until Mick Rory discovers one of them in the middle of his well-deserved vacation in Aruba. Seeing this as an opportunity to continue their time traveling heroics, Sara wastes no time in getting the Legends back together."

"We reunite with billionaire inventor Ray Palmer, the unconventional historian-turned-superhero Nate Heywood, and Professor Martin Stein and Jefferson “Jax” Jackson, who together form the meta-human Firestorm. Once reunited, the Legends will challenge the Time Bureau’s authority over the timeline and insist that however messy their methods may be, some problems are beyond the Bureau’s capabilities. Some problems can only be fixed by Legends."

Confirmed plot points

 * There will be a four-way crossover with Supergirl, The Flash, and Arrow.
 * The crossover will take place over two nights and will consist of 2 "two-hour miniseries". The first "two-hour miniseries" will consist of Supergirl and Arrow while the second one will consist of The Flash and DC's Legends of Tomorrow.
 * The crossover will have high emotional stakes and emotional payoffs with romance in the air.
 * The title of the crossover is Crisis on Earth-X.
 * Leonard Snart will return. He will be a recurring guest.
 * The version of Snart that will be a "bizarro" version.
 * Sara Lance will possibly have a new love interest.
 * Ray’s brother Sydney may appear this season, to also be played by Brandon Routh.
 * Matt Ryan will reprise his role as John Constantine in this season.
 * The Big Bad, Mallus, will first appear in the tenth episode.
 * Victor Garber will leave the series as a series regular during this season.
 * Jonah Hex may return.
 * This will be the last season of DC's Legends of Tomorrow to feature Wentworth Miller as Leonard Snart/Captain Cold.