Mark Mardon, having survived his apparent death during the black-matter explosion, returns seeking revenge on Joe for the death of his brother Clyde... and has the same weather-manipulation powers as his deceased sibling.
Grant Gustin
Barry Allen / The Flash
Danielle Panabaker
Dr. Caitlin Snow
Rick Cosnett
Eddie Thawne
Carlos Valdes
Cisco Ramon
Tom Cavanagh
Harrison Wells
Jesse L. Martin
Joe West
Candice Patton
Iris West
Roger Howarth
Mason Bridge
Jenn MacLean-Angus
Surgeon
Fred Henderson
Coroner
Jeremy Schuetze
Rob
Liam McIntyre
Mark Mardon / Weather Wizard
Melise
Linda Park
Naomi King
Woman
Chad Rook
Clyde Mardon
Patrick Sabongui
David Singh
