Season 4 (The Flash)

The fourth season of ​​ premiered on October 10, 2017 on The CW and concluded on May 22, 2018. The season consisted of 23 episodes.

Main cast

 * Grant Gustin as Barry Allen/The Flash
 * Candice Patton as Iris West
 * Danielle Panabaker as Dr. Caitlin Snow/Killer Frost
 * Carlos Valdes as Cisco Ramon/Vibe
 * Keiynan Lonsdale as Wally West/Kid Flash
 * Neil Sandilands as Professor Clifford DeVoe/The Thinker
 * Tom Cavanagh as Dr. Harrison "Harry" Wells, Harrison Wolfgang Wells, H. Lothario Wells, Wells 2.0, Wells the Grey, Professor Eobard Thawne/Reverse-Flash, Sonny Wells, and H.P. Wells
 * Jesse L. Martin as Detective Joe West

Recurring Cast

 * Danielle Nicolet as District Attorney Cecille Horton
 * Mark Sweatman as Matthew Norvock
 * Kim Engelbrecht as Dr. Marlize DeVoe
 * Dominic Burgess as Ramsey Deacon/Kilg%re
 * Patrick Sabongui as Captain David Singh
 * Jessica Camacho as Cynthia/Gypsy
 * Donna Pescow as Dr. Sharon Finkel
 * Richard Brooks as Warden Gregory Wolfe
 * Sugar Lyn Beard as Becky Sharpe/Hazard and Professor Clifford DeVoe/The Thinker
 * Danny Trejo as Josh/Breacher
 * Hartley Sawyer as Ralph Dibny/Elongated Man and Professor Clifford DeVoe
 * Katee Sackhoff as Amunet Black
 * Chelsea Kurtz as Mina Chaytan/Black Bison
 * Kendrick Sampson as Dominic Lanse/Brainstorm and Professor Clifford DeVoe/The Thinker
 * Ryan Alexander McDonald as Neil Borman/Fallout
 * Bill Goldberg as David Ratchet
 * Jessica Parker Kennedy as Nora West-Allen/XS
 * Derek Mears as Sylbert Rundine/Dwarfstar
 * Paul McGillion as Earl Cox
 * Miranda MacDougall as Izzy Bowin/The Fiddler and Professor Clifford DeVoe/The Thinker
 * Leonardo Nam as Matthew Kim/Melting Point
 * Bethany Brown as Janet Petty/Null

Synopsis
Running up against an evil time remnant version of yourself is something no one should ever have to do, but that’s exactly what faced Barry Allen (aka The Flash) as he fought to save the life of fiancée Iris West from the God of Speed known as Savitar.

Barry’s victory was short-lived, however, as an unbalanced Speed Force began to wreak havoc on Central City, forcing Barry to sacrifice himself for the greater good.

With The Fastest Man Alive now trapped inside an extra-dimensional energy, and unknown dangers lurking in the shadows, it will be up to Team Flash to free Barry from his own personal Hell.

Trivia

 * This is the first season of ​​ that Rick Cosnett, Robbie Amell, Wentworth Miller, Dominic Purcell, and Matt Letscher don't reprise their roles as Eddie Thawne, Ronnie Raymond, Leonard Snart, Mick Rory, and Eobard Thawne.
 * However, Wentworth Miller plays Leonard's Earth-X doppelgänger: Leo Snart.