- Michael Riendeau - Anthony Sullivan
- Laurence Leboeuf - Young Margaret Cain
- Henry Kwok - Cheng
- André Simoneau - Young Henry Sullivan
- Mark Camacho - Detective Fontaine 1972
- Chimwemwe Miller - Frank
- John Koensgen - Officer Simmons
- Nadia Verrucci - Nurse Donna
- Catherine Bérubé - Lisa Cooke
- Frédéric Pierre - Policeman #1
- Alex Bisping - Policeman #2
- Éric Bélanger - Policeman #3
- Danny Blanco Hall - Police Captain
- Sienna Mazzone - Justine
- Stéphanie Breton - Maternity Nurse 1972
- Chadi Alhelou - Saïd
- Christophe LaPier - Music Producer
- Charlotte Sullivan - Andrea Smith
- Kaniehtiio Horn - Sergeant-Detective Capolla (as Tiio Horn)
- Patricia Summersett - Anne-Marie Duval
- Jane Wheeler - Maria Perez
- Helena-Alexis Seymour - Stripper Melanie
- Michel Perron - Mr Stackhouse
- Bronwen Mantel - Mrs Dunn
- Deena Aziz - Dr. Amin
- Judith Baribeau - Sergeant Lydia Douglas
- Roc LaFortune - Jim Chilton
- Ashton Smiley - Luke Sullivan (10 yrs)
- Habree Larratt - Catherine Sullivan (8 yrs)
- Auden Larratt - David Smith (10 yrs)
- Mikaël Conde - Clerk Service Station 116
- Daniel Rindress-Kay - Drummondville Patrolman
- Matt Keyes - Service Station manager
- Janet Rice - Sylvia
- Amy Sobol - Drummonville Waitress #1
- Jenny Brizard - Drummonville Waitress #2
- Sean Devine - Stephen Price
- Andreas Apergis - Alex Lynch
- Edward Yankie - Gill Cartwright
- Atif Y. Siddiqi - Mandy
- Larry Day - Norman Charters
- Raphael Grosz-Harvey - Stoner #1
- Teneisha Collins - Journalist Julia Davis
- Chip Chuipka - Martin Lackey
- Anton Koval - Stoner #2
- Vlasta Vrana - Brother John
- Frank Schorpion - Michael Smith
- Joanna Noyes - Debbie Smith
- Olga Montes - Receptionist Nursing Home
- Jodie Resther - Henry's Nurse
- Monique Spaziani - Margaret Sullivan (60 yrs)
- Jason Cavalier - Eric Barclay
- Linda E. Smith - Dr. Sandhu
- Eve Gadouas - Policewoman
- Melissa Toussaint - Nurse ICU
- Trevor Hayes - Swat Leader #2
- Tristan D. Lalla - Sergeant-Detective Johnson
- André Bédard - Police Officer
- Hudson Leblanc - Young Stephen Price
- Meghan Gabruch - Erin (Charles' Wife)
- Benjamin Roy - Teenager Boy
- Jérémie Earp - Michael Smith (22 yrs)
- Kevin Parent - Sergeant-Detective Charles Cooper
- Neil Napier - Fred Cameron
- Julie Seebacher - Jenny
- Myriam Lemay-Bonin
- Keven P. Parent
- Gabriel Guérin
- Valérie Milot
- Caroline Morissette
- Delphine Le Courtois
- Carole Dionne
- Kathleen Côté
- Julie Cyrenne
- Martine Curey-Salvas
- Andrew Couturier
- Catherine Faucher
- Jo Caron
- Benoît Charest
- Michel Lecoufle
- Annie Bouvrette
- Pierre Laroche
- Erika Alexander
Aden Young interpreta a Luke Sullivan en la serie.
Peter Coyote interpreta a Henry Sullivan en la serie.
Camille Sullivan interpreta a Helen Murphy Sullivan en la serie.
Joanne Kelly interpreta a Catherine Sullivan en la serie.
Micheline Lanctôt interpreta a Lieutenant-Detective Susan Bowden en la serie.
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