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The Flash S06E09, Crisis on Infinite Earths: Part Three (III)S06E09

The Flash · Season 6

The Flash season 6 episode 9: Crisis on Infinite Earths: Part Three (III)

Aired 10 December 201942 minRated TV-PG

7.7TMDB · 19 votesMark watched

Where to watch The Flash Season 6 in Australia

The Flash season 6 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 $44.99 and Prime Video Store from $29.99.

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Free

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Availability checked 16 November 2026.

What happens in “Crisis on Infinite Earths: Part Three (III)”

Pariah enlists Black Lightning to help stop the Anti-Monitor after Flash-90 shares what he learned from his battle in ‘Elseworlds.’ With the help of Black Lightning, Barry, Cisco and Killer Frost come up with a plan that could save them all. Meanwhile, Iris has a heart-to-heart with Ryan Choi, while Oliver and Diggle return to an old familiar stomping ground. The crossover starts on Supergirl S05E09 and Batwoman S01E09. It continues on Arrow S08E08 and Legends of Tomorrow S05E01.

Episode summary: TMDB.

Before you watch

  • It is episode 9 of 19 of season 6, so watch episodes 1 to 8 first.
  • It runs about 42 minutes.
  • Directed by David McWhirter, written by Lauren Certo, Eric Wallace and Sterling Gates.
  • TMDB users rate it 7.7 out of 10 (19 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
David McWhirter
Writers
Lauren CertoEric WallaceSterling Gates
Guest stars
Melissa Benoist as Kara Danvers / SupergirlTyler Hoechlin as Clark Kent / SupermanKatherine McNamara as Mia SmoakJon Cryer as Lex LuthorCaity Lotz as Sara Lance / White CanaryBrandon Routh as Ray Palmer / The Atom / Clark Kent / SupermanElizabeth Tulloch as Lois LaneJohn Wesley Shipp as Barry Allen / The Flash (Earth 90)

Credits: TMDB.

More from The Flash Season 6

Previous · S06E08The Last Temptation of Barry Allen (2)3 December 2019Next · S06E10Marathon4 February 2020
  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

Every episode of Season 6The 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.