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The Flash S04E18, Lose YourselfS04E18

The Flash · Season 4

The Flash season 4 episode 18: Lose Yourself

Aired 17 April 201842 minRated TV-PG

7.4TMDB · 31 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

Buy or rent

Availability checked 16 November 2026.

What happens in “Lose Yourself”

When Barry and Team Flash find a way to enter The Thinker’s lair, Ralph considers crossing a dangerous line to defeat DeVoe. Meanwhile, Joe is concerned by Harry’s recent behavior.

Episode summary: TMDB.

Before you watch

  • It is episode 18 of 23 of season 4, so watch episodes 1 to 17 first.
  • It runs about 42 minutes.
  • Directed by Hanelle M. Culpepper, written by Gabriel Garza and Jonathan Butler.
  • TMDB users rate it 7.4 out of 10 (31 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
Hanelle M. Culpepper
Writers
Gabriel GarzaJonathan Butler
Guest stars
Hartley Sawyer as Ralph Dibny / Elongated ManArturo del Puerto as Edwin Gauss / Folded ManMiranda MacDougall as Izzy BowinKim Suzanne Engelbrecht as Marlize DeVoe / The MechanicAndrew Barber as Hippie GuyJoel Wirkkunen as Bus DriverNeil Sandilands as Clifford DeVoe / The ThinkerBethany Brown as Janet Petty / Null

Credits: TMDB.

More from The Flash Season 4

Previous · S04E17Null and Annoyed10 April 2018Next · S04E19Fury Rogue24 April 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.