The Flash 8×05 “Armageddon, Part 5” Season 8 Episode 5 Promo – THE EXCITING CONCLUSION TO THE FIVE PART ARMAGEDDON EVENT BRINGS THE RETURN OF MIA QUEEN – The conclusion to Armageddon presents an opportunity for The Flash (Grant Gustin) to end his lifelong battle with Reverse Flash (guest star Tom Cavanagh) for good, but the payoff could be too much for Barry and team to handle. Meanwhile, Mia Queen (guest star Katherine McNamara) drops in from the future looking to save a lost loved one, and she won’t let anything stand in her way. Menhaj Huda directed the episode written by Kristen Kim (805). Original airdate 12/14/2021. 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.