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The Flash S03E08, Invasion! (II)S03E08

The Flash · Season 3

The Flash season 3 episode 8: Invasion! (II)

Aired 29 November 201641 minRated TV-PG

7.8TMDB · 51 votesMark watched

Where to watch The Flash Season 3 in Australia

The Flash season 3 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 $27.99.

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Free

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Availability checked 16 November 2026.

What happens in “Invasion! (II)”

When aliens called the Dominators attack Central City, Barry speeds over to Star City to ask the Green Arrow for help in stopping them. Realizing the battle against the Dominators is bigger than they thought, they track down the Legends of Tomorrow, and Barry and Cisco create a breach to bring back a secret weapon – Supergirl. Once all of the super friends are assembled, they come up with a plan to attack but a shocking secret related to Flashpoint is revealed and suddenly no one is sure who they can trust. Meanwhile, Wally wants to join the battle against the aliens but Iris tells him he’s not ready. The crossover starts on Supergirl S02E08 Medusa (I). It continues on Arrow S05E08 Invasion! (III) and DC's Legends of Tomorrow S02E07 Invasion! (IV).

Episode summary: TMDB.

Before you watch

  • It is episode 8 of 23 of season 3, so watch episodes 1 to 7 first.
  • It runs about 41 minutes.
  • Directed by Dermott Downs, written by Andrew Kreisberg, Greg Berlanti, Todd Helbing and Aaron Helbing.
  • TMDB users rate it 7.8 out of 10 (51 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
Dermott Downs
Writers
Andrew KreisbergGreg BerlantiTodd HelbingAaron Helbing
Guest stars
Emily Bett Rickards as Felicity SmoakDominic Purcell as Mick Rory / Heat WaveFranz Drameh as Jefferson 'Jax' Jackson / FirestormChristina Brucato as Lily SteinJerry Wasserman as PresidentMelissa Benoist as Kara Danvers / SupergirlCaity Lotz as Sara Lance / White CanaryAudrey Marie Anderson as Lyla Michaels

Credits: TMDB.

More from The Flash Season 3

  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 3The 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.