Michael Shanks
as Dr. Charles "Charlie" Harris
Erica Durance
as Dr. Alex Reid
Benjamin Ayres
as Dr. Zachary "Zach" Miller
Julia Chan
as Dr. Maggie Lin
Husein Madhavji
as Dr. Shahir Hamza
Joseph Pierre
as Nurse Jackson Wade
Michelle Nolden
as Dr. Dawn Bell
Daniel Gillies
as Dr. Joel Goran
Wendy Crewson
as Dr. Dana Kinney
Milton Barnes
as Dr. Wayne Sharpe
Glenda Braganza
as Dr. Melanda Tolliver
Kristopher Turner
as Dr. Gavin Murphy
Kim Shaw
as Dr. Cassie Williams
K.C. Collins
as Dr. Tom Reycraft
Dejan Loyola
as Dr. Dev Sekara
Salvatore Antonio
as Nurse Victor Reis
Stacey Farber
as Dr. Sydney Katz
Danso Gordon
as Dr. Rian Larouche
Peter Mooney
as Dr. Jeremy Bishop
Parveen Kaur
as Dr. Asha Mirani
Jarod Joseph
as Dr. Emmanuel Palmer
Nicole Underhay
as Kristine Fields
Max Bennett
as Dr. Patrick Curtis