Details
- Show
- The Flash (2014)
- Season
- Season 3
- Episode
- S03xE21
- Air Date
- 09 May 2017
- Where to watch
Overview
The Flash season 3, episode 21 — “Cause and Effect” (S03xE21) first aired on 09 May 2017.
Barry takes drastic measures to stop Savitar. Meanwhile, H.R. continues to push Tracy Brand to design the trap for Savitar and Killer Frost returns with an interesting proposal.