Laura Regan

Character: Julia Lund

Marc Blucas

Character: Paul Loomis

Ethan Embry

Character: Sam Burnside

Jon Abrahams

Character: Billy Parks

Dagmara Dominczyk

Character: Terry Alba

Desiree Zurowski

Character: Mary Parks

Alexander Gould

Character: Young Billy

Mark Hildreth

Character: Troy

Jonathan Cherry

Character: Darren

Jessica Amlee

Character: Young Julia

Jay Brazeau

Character: Dr. Booth

L. Harvey Gold

Character: Professor Crowley

David Abbott

Character: Professor Adkins

Jodelle Ferland

Character: Sarah

Peter LaCroix

Character: David Parks (as Peter Lacroix)

Colin Foo

Character: Chinese Chef