[2] The season is produced by Berlanti Productions, Warner Bros. Television, and DC Entertainment, with Eric Wallace serving as showrunner.

Grant Gustin stars as Barry Allen / Flash, with principal cast members Candice Patton, Danielle Panabaker, Danielle Nicolet, Kayla Compton, and Brandon McKnight also returning from previous seasons, while Jon Cor was promoted to series regular from his recurring status in the previous two seasons.

[45] Main cast members Gustin, Candice Patton, Danielle Nicolet, Kayla Compton and Brandon McKnight return as Barry Allen / The Flash,[41] Iris West-Allen,[48] Cecile Horton,[49] Allegra Garcia[1] and Chester P.

[50] Jesse L. Martin, who portrayed Joe West throughout the series, exited as a regular, though he was expected to recur in the season.

[52] Danielle Panabaker, who portrayed Caitlin Snow and Frost in previous seasons, was reported to be returning,[1] but was later confirmed to be playing a new character whose identity was later revealed in the second episode.