The Flash
Cause and Effect
Season 3, Episode 21 · Aired 2017-05-09
Synopsis
Cisco comes up with a plan to stop Savitar involving preventing Barry from forming short-term memories. However, the plan doesn't go as intended. Meanwhile, Killer Frost returns to S.T.A.R. Labs to help the team.
In the series
This episode is part of The Flash (2014–2023) on The CW.
Scarlet speedster optimism — multiverse soap with heart-on-sleeve heroics.
Key cast
- Grant Gustin as Barry Allen / The Flash
- Candice Patton as Iris West
- Danielle Panabaker as Caitlin Snow
- Carlos Valdes as Cisco Ramon
- Tom Cavanagh as Harrison Wells
- Jesse L. Martin as Joe West