The Flash 8×03 “Armageddon, Part 3” Season 8 Episode 3 Sneak Peek – BLACK LIGHTNING, RYAN WILDER, ALEX DANVERS AND RYAN CHOI APPEAR – Barry (Grant Gustin) meets Black Lightning (guest star Cress Williams) at the Hall of Justice after things take a dire turn with Despero (guest star Tony Curran). Iris (Candice Patton) suspects something is off with Despero’s vision of the future so she seeks help from a powerful ally. Javicia Leslie, Chyler Leigh and Osric Chau guest star. Chris Peppe directed the episode written by Sam Chalsen (803). Original airdate 11/30/2021. Every episode of THE FLASH will be available to stream on The CW App and CWTV.com the day after broadcast for free and without a subscription, log-in or authentication required.