Acteurs et actrice

Matt Gordon = Oliver Shaw (Officier instructeur)

Missy Peregrym = Andy McNally (Recrue)

Peter MacNeill = Tommy McNally (père d'Andy)

Charlotte Sullivan = Gail Peck (Recrue) (fille de la commandante Elaine Peck et soeur de Steve Peck)

Gregory Smith = Dov Epstein (Recru)

Melanie Nicholls-King = Noelle Williams (Officier instructeur)

Enuka Okuma = Traci Nash (Recrue)

Lyriq Bent = Frank Best (chef)

Travis Milne = Chris Diaz (Recru)

Ben Bass = Sam Swarek 

Eric Johnson = Détective Luke Callaghan

Noam Jenkins = Lieutenant Jerry Barber

Aaron Abrams = Détective Donovan Boyd

Saison 2

Camille Sullivan = Lieutenant Jo Rosati

Joris Jarsky = Russell Mackie

Mayko Nguyen = Sue Tran

Lauren Holly = Commandante Elaine Peck (mère Gail Peck et de Steve Peck))

Saison 3

Peter Mooney = Agent Nick Collins

Pat Mastroianni = Doug Corbo

Anthony Ulc = Officier Andrews

Siobhan Murphy = Becca  Nicholson

Benz Antoine = Père Jean-Pierre

Seana McKenna = Détective Sarah Mills

Emily Hampshire = Celery

Saison 4

Rachel Ancheril = Marlo Cruz

Priscilla Faia = Chloe Price

Brendee Green = Denise

Drew Davis = Leo

Adam MacDonald = Steve Peck (frère de Gail Peck)

Aliyah O'Brien = Holly Stewart

Marci T. House = Sergente Malloy

Saison 5 

Jefferson Brown = Dex Slade

Matt Murray = Duncan Moore

Jim Codrington = Sergent Bailey

Milton Barnes = Officier Curtis

Alexandra Castillo = Lieutenante Inez Capello

Bridget Wareham = Lauralee

Dayo Ade = Russ

Erin Karpluk = Juliet Ward

Jena Peck = Détective Lorraine Norman

Bill MacDonald = Bill Peck (père de Gail et Steve)