Cause and Effect (S03E21)
S03E21
Title: Consequences Plot: In a bold move to thwart Savitar, Barry resorts to extreme tactics. At the same time, H.R. persistently encourages Tracy Brand to create a device intended to ensnare Savitar. As events unfold, Killer Frost makes her return, bringing with her a surprising offer that could change everything.
Show
The Flash (2014)
Episode
S03E21
Air Date
May 09, 2017
Season 3 Episodes
S03E01
Flashpoint
S03E02
Paradox
S03E03
Magenta
S03E04
The New Rogues
S03E05
Monster
S03E06
Shade
S03E07
Killer Frost
S03E08
Invasion! (II)
S03E09
The Present
S03E10
Borrowing Problems from the Future
S03E11
Dead or Alive
S03E12
Untouchable
S03E13
Attack on Gorilla City (1)
S03E14
Attack on Central City (2)
S03E15
The Wrath of Savitar
S03E16
Into the Speed Force
S03E17
Duet (II)
S03E18
Abra Kadabra
S03E19
The Once and Future Flash
S03E20
I Know Who You Are
S03E21
Cause and Effect
S03E22
Infantino Street
S03E23
Finish Line