Cameron Monaghan

as Kevin O'Doyle

as Twin 1 (voice)

as Chad

as Elliot

as Asher

as Eddie Sandow

as (archive footage)

as Jerome Valeska

as Ian Gallagher

as Tyler Carson

as Nick Peyton

as Mason Ashford

as Caius

as Danny Cooper

as Connor Kent / Superboy (voice)

as Traffic Cop #1

as James Walker

as Palmer Noid

as Eddie Sandow

as Connor Kent / Superboy (voice)

as Jonathan McKenna

as Corey Doyle

as Todd

as Chris Decker

as Special Agent Finley Sterling

as Adam McCormick

as Cody Grice

as Young Boy 1

as Bob Andrews

as Bob Andrews

as Jeff

as Kamandi (voice)

as Jeremiah Valeska/The Joker (archive footage)

as Luke Hunter

as Dexter

as Self

as Ross

as Tom Fairfax

as Winthrop Paroo

as Timmy

as Sergei (voice)

as Cal Kestis (voice)

as Ian Gallagher

as Aaron

as Larry Parker

as student (uncredited)

as Jack

as Jake

as Self

as Clyde

as Corey

Role: Director