Laura Regan as Julia Lund

Marc Blucas as Paul Loomis

Ethan Embry as Sam Burnside

Jon Abrahams as Billy Parks

Dagmara Dominczyk as Terry Alba

Desiree Zurowski as Mary Parks

Alexander Gould as Young Billy

Mark Hildreth as Troy

Jonathan Cherry as Darren

Jessica Amlee as Young Julia

Jay Brazeau as Dr. Booth

L. Harvey Gold as Professor Crowley

David Abbott as Professor Adkins

Jodelle Ferland as Sarah

Peter LaCroix as David Parks (as Peter Lacroix)

Colin Foo as Chinese Chef