Steve Clark

James Marsden

Rachel Wagner

Katie Holmes

Gavin Strick

Nick Stahl

Officer Cox the BIG Rat

Steve Railsback

Dr. Edward Caldicott

Bruce Greenwood

Dorian Newberry

William Sadler

John (as Stephen James Lang)

Stephen J. Lang

U.V.

Chad Donella

Lindsay Clark

Katharine Isabelle

Andy Effkin

Tobias Mehler

Officer Kramer

Chris Owens

Allen Clark

Ethan Embry

Nathan Clark

Terry David Mulligan

Cynthia Clark

Susan Hogan

Charles 'Chug' Roman

A.J. Buckley

Trent Whalen

Derek Hamilton

Dickie Atkinson

Tygh Runyan

Lorna Longley

Crystal Cass

Mr. Rooney

Dan Zukovic

Frankie

Stephen E. Miller

Ferry Guy

Robert Moloney

Robby Stewart

P.J. Prinsloo

Mary Jo Copeland

Natassia Malthe

Randi Sklar

Michelle Skalnik

Security Guard

Doug Abrahams

Kathy

Lalainia Lindbjerg

Brendan - Motor Jock

Brendan Fehr

Tom Cox

David Paetkau

Coach (uncredited)

Garry Chalk

Principal Weathers

Jay Brazeau

Miss Perkins

Sarah-Jane Redmond

Fiona

Fiona Scott

Judy Effkin

Gillian Barber

Mr. Strick

Peter LaCroix

Shannon

Erin Tougas

Mrs. Strick

Lynda Boyd

Ryan - Blue Ribbon

Ryan Taylor

Daniella

Daniella Evangelista

Abbey

Carly Pope

Middle-Aged Man

John Destry

Coupon Lady

Glynis Davis

Coupon Lady

Glynis Davies

Mrs. Atkinson (uncredited)

Cynde Harmon

Roscoe

Andre Danyliu

Coroner

Larry Musser

Female Doctor

Suzy Joachim

Screaming Man

Christopher R. Sumpton

Flossing Man

Jarred Blancard

Make-up Girl

Kate Braidwood

Toothbrush Boy

Stephen Holmes

Schoolbus Boy (uncredited)

Sean Smith

Shannon's Mother (uncredited)

Zuzana Marlow

Betty Caldicott

Julie Patzwald

Detrice (uncredited)

Tamsin Kelsey

Female Doctor

Suzy Joaquim

Assistant Principal

Dee Jay Jackson

Disrespectful Student

Kendall Saunders

Anesthesiologist (uncredited)

Fulvio Cecere

Damon (uncredited)

Sean Amsing

Shadow Man (uncredited)

Bob Wilde

Shadow Woman (uncredited)

Judith Maxie

Nurse (uncredited)

Melanie Angel

Bald Man

Mark Avis

Student (uncredited)

Corey Large

Moderator (uncredited)

Robert Lewis

Reporter

Marcia Rose Shestack

Chera - Blue Ribbon (uncredited)

Bailee Reid

Nurses Assistant (uncredited)

Clarence Sponagle