Cause and Effect
The Flash · Season 3 · Episode 21
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.
Season 3
- Episode 1 · Flashpoint
- Episode 2 · Paradox
- Episode 3 · Magenta
- Episode 4 · The New Rogues
- Episode 5 · Monster
- Episode 6 · Shade
- Episode 7 · Killer Frost
- Episode 8 · Invasion! (II)
- Episode 9 · The Present
- Episode 10 · Borrowing Problems from the Future
- Episode 11 · Dead or Alive
- Episode 12 · Untouchable
- Episode 13 · Attack on Gorilla City (1)
- Episode 14 · Attack on Central City (2)
- Episode 15 · The Wrath of Savitar
- Episode 16 · Into the Speed Force
- Episode 17 · Duet (II)
- Episode 18 · Abra Kadabra
- Episode 19 · The Once and Future Flash
- Episode 20 · I Know Who You Are
- Episode 21 · Cause and Effect
- Episode 22 · Infantino Street
- Episode 23 · Finish Line