Episode 9
S4 E9 December 11, 2018 0h 43m
★ 7.0
Source:
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Guest Stars
LaMonica Garrett
Mar Novu / The Monitor
Carlos Valdes
Cisco Ramon
Danielle Panabaker
Caitlin Snow / Killer Frost
Jeremy Davies
John Deegan
Bob Frazer
Roger Hayden / Psycho-Pirate
John Wesley Shipp
Barry Allen / The Flash (Earth 90) (archive footage)
Grant Gustin
Barry Allen / The Flash
Stephen Amell
Oliver Queen / Green Arrow
