The Flash: 4x21
Episode 21
4 - 1The Flash Reborn Oct. 10, 2017
4 - 2Mixed Signals Oct. 17, 2017
4 - 3Luck Be a Lady Oct. 24, 2017
4 - 4Elongated Journey Into Night Oct. 31, 2017
4 - 5Girls Night Out Nov. 07, 2017
4 - 6When Harry Met Harry... Nov. 14, 2017
4 - 7Therefore I Am Nov. 21, 2017
4 - 8Crisis on Earth-X (III) Nov. 28, 2017
4 - 9Don't Run Dec. 05, 2017
4 - 10The Trial of The Flash Jan. 16, 2018
4 - 11The Elongated Knight Rises Jan. 23, 2018
4 - 12Honey, I Shrunk Team Flash Jan. 30, 2018
4 - 13True Colors Feb. 06, 2018
4 - 14Subject 9 Feb. 27, 2018
4 - 15Enter Flashtime Mar. 06, 2018
4 - 16Run, Iris, Run Mar. 13, 2018
4 - 17Null and Annoyed Apr. 10, 2018
4 - 18Lose Yourself Apr. 17, 2018
4 - 19Episode 19 Apr. 24, 2018
4 - 20Episode 20 May. 01, 2018
4 - 21Episode 21 May. 08, 2018
4 - 22Episode 22 May. 15, 2018
4 - 23Episode 23 May. 22, 2018