Season 3 (DC's Legends of Tomorrow)

The third season of ​ premiered on October 10, 2017, on The CW and concluded on April 9, 2018, on The CW. The season consisted of 18 episodes.

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.

Main Cast

 * Victor Garber as Firestorm (Martin Stein) & Henry Stein *
 * Brandon Routh as The Atom (Ray Palmer)
 * Caity Lotz as White Canary (Sara Lance)
 * Franz Drameh as Firestorm (Jefferson "Jax" Jackson) *
 * Maisie Richardson-Sellers as Vixen (Amaya Jiwe)
 * Amy Louise Pemberton as Gideon
 * Tala Ashe as Zari Tomaz *
 * Keiynan Lonsdale as Kid Flash (Wally West) *
 * Nick Zano as Steel (Nate Heywood)
 * Dominic Purcell as Heat Wave (Mick Rory)

Recurring Cast

 * Arthur Darvill as Rip Hunter
 * Keiynan Lonsdale as Kid Flash (Wally West) *
 * Chris Carson as Alan
 * Simon Merrells as Julius Caesar
 * Jes Macallan as Agent/Director 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 and Mallus (possessing Nora Darhk)
 * John Noble as Mallus (voice), John Noble, and Denethor
 * Neal McDonough as Damien Darhk
 * Bar Paly as Helen of Troy
 * Daniel Cudmore as Grodd (uncredited)
 * David Sobolov as Grodd (voice)
 * Wentworth Miller as Citizen Cold (Leo Snart)
 * Katia Winter as Freydís
 * Ben Diskin as Bee o (voice)
 * Matt Ryan as John Constantine
 * Jonathan Cake as Edward Teach

In-Universe Guest Stars

 * Echo Kellum as Mr. Terrific (Curtis Holt)
 * Stephen Amell as Green Arrow (Oliver Queen) & Dark Arrow (Oliver)
 * David Ramsey as John Diggle
 * Emily Bett Rickards as Felicity Smoak
 * Tom Cavanagh as Harry Wells & Reverse-Flash/Harrison Wells (Eobard Thawne)
 * Chyler Leigh as Alex Danvers
 * Candice Patton as Iris West-Allen
 * Danielle Panabaker as Killer Frost (Caitlin Snow)
 * Carlos Valdes as Vibe (Cisco Ramon)
 * Rick Gonzalez as Wild Dog (Rene Ramirez)
 * Juliana Harkavy as Black Canary (Dinah Drake)
 * Melissa Benoist as Supergirl/Kara Danvers (Kara Zor-El) and Overgirl (Kara)
 * Grant Gustin as The Flash (Barry Allen)
 * Russell Tovey as The Ray (Ray Terrill)
 * Isabella Hofmann as Clarissa Stein
 * Bailey Tippen as Astra Logue

Notes:
 * 1) Victor Garber is credited as a series regular through 3x08.
 * 2) Franz Drameh is credited as a series regular through 3x08  and a special guest star in.
 * 3) Tala Ashe is credited as a series regular from 3x03  onwards.
 * 4) Keiynan Lonsdale is credited as a special guest star for 2 episodes ( & ) before joining the main cast in 3x12.
 * 5) Keiynan Lonsdale is upgraded to series regular in 3x12.