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The Flash S04E14, Subject 9S04E14

The Flash · Season 4

The Flash season 4 episode 14: Subject 9

Aired 27 February 201842 minRated TV-PG

7.1TMDB · 28 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 “Subject 9”

Barry meets a powerful woman whose abilities could help him in his battle with DeVoe. Meanwhile, after learning that DeVoe is targeting everyone who was on the bus, Ralph decides he doesn't want to be a hero anymore, his only concern is staying alive. Harry offers to help Joe.

Episode summary: TMDB.

Before you watch

  • It is episode 14 of 23 of season 4, so watch episodes 1 to 13 first.
  • It runs about 42 minutes.
  • Directed by Ralph Hemecker, written by Mike Alber and Gabe Snyder.
  • TMDB users rate it 7.1 out of 10 (28 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
Ralph Hemecker
Writers
Mike AlberGabe Snyder
Guest stars
Danielle Nicolet as Cecile HortonHartley Sawyer as Ralph Dibny / Elongated ManBailey Corneal as Detective AddieMiranda MacDougall as Izzy BowinKim Suzanne Engelbrecht as Marlize DeVoe / The MechanicSugar Lyn Beard as Becky Sharpe / The ThinkerKendall Cross as Mayor Van BurenPatrick Sabongui as David Singh

Credits: TMDB.

More from The Flash Season 4

Previous · S04E13True Colors6 February 2018Next · S04E15Enter Flashtime6 March 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.