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The Flash S04E21, Harry and the HarrisonsS04E21

The Flash · Season 4

The Flash season 4 episode 21: Harry and the Harrisons

Aired 8 May 201842 minRated TV-PG

6.7TMDB · 32 votesMark watched

Where to watch The Flash Season 4 in Australia

The Flash season 4 is streaming in Australia on Prime Video (subscription), HBO Max (subscription) and Stan (subscription), and free on 9Now. You can also buy it on Apple TV from $29.99, Fetch TV from $29.99 and Prime Video Store from $24.99.

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Free

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Availability checked 16 November 2026.

What happens in “Harry and the Harrisons”

With DeVoe's Enlightenment device nearly complete, in order to disable it The Flash and his team must put their faith in an unlikely ally – Amunet Black. Meanwhile, Harry hits an all-time low when the "Council of Wells" kicks him out but then Cisco introduces him to the "Council of Harrisons."

Episode summary: TMDB.

Before you watch

  • It is episode 21 of 23 of season 4, so watch episodes 1 to 20 first.
  • It runs about 42 minutes.
  • Directed by Kevin Mock, written by Lauren Certo and Judalina Neira.
  • TMDB users rate it 6.7 out of 10 (32 votes).

The Flash trailer

The official trailer for the series (no preview of this episode has been published).

The Flash trailerPlay video: The Flash trailer

Cast and crew of this episode

Director
Kevin Mock
Writers
Lauren CertoJudalina Neira
Guest stars
Leo Chiang as Yakuza BaddieMark Sweatman as NorvockKatee Sackhoff as Amunet Black / Blacksmith

Credits: TMDB.

More from The Flash Season 4

Previous · S04E20Therefore She Is1 May 2018Next · S04E22Think Fast15 May 2018
  1. E01
  2. E02
  3. E03
  4. E04
  5. E05
  6. E06
  7. E07
  8. E08
  9. E09
  10. E10
  11. E11
  12. E12
  13. E13
  14. E14
  15. E15
  16. E16
  17. E17
  18. E18
  19. E19
  20. E20
  21. E21
  22. E22
  23. E23

Every episode of Season 4The Flash episode guide

Episode names, air dates, runtimes, stills and ratings: TMDB. Air dates are the first broadcast anywhere; where it streams is our daily Australian check.