Season 3 • Episode 21

Cause and Effect

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2017-05-09 ★ 7.4 42 min

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.

Guest Stars

Danielle Nicolet

Richard Zeman

Liam Hughes

Sasha Rojen

Tobin Bell

Anne Dudek

Andre Tricoteux

Ken Camroux-Taylor