Cameron Britton
as Hazel
Tom Hopper
as Number One/Luther
David Castañeda
as Number Two/Diego
Robert Sheehan
as Number Four/Klaus
Emmy Raver-Lampman
as Number Three/Allison
Adam Godley
as Pogo
Ashley Madekwe
as Detective Patch
Aidan Gallagher
as Number Five
John Magaro
as Leonard Peabody
Sheila McCarthy
as Agnes
Justin H. Min
as Ben
Julian Richings
as Chet Rodo
Justin Paul Kelly
as Harlan
Britne Oldford
as Fei
Kevin Rankin
as Elliott
Justin Cornwell
as Marcus
Jake Epstein
Genesis Rodriguez
as Sloane
Cazzie David
as Jayme
Javon "Wanna" Walton
as Stan