Sandra Sullivan

Claire Malone (48 episodes)

Liz Sterling

Marie Cook

Commander Truffault (2 episodes)

Charlotte Singer

Marion

Dr. Michelle Kessler (1 episode)

Natalie Lawson (20 episodes)

Opening Narrator (voice) (8 episodes)

Self

(1 episode)

Dr. Kaycee Leeds

Evelyn (1 episode)

Chief Geiger

Alex (1 episode)

Jordan Hampton (2 episodes)

Lorraine Healey

Elizabeth Weir (64 episodes)

Dr. Elizabeth Weir (3 episodes)

Dr. Katie Arlen

Ms Sheila Newlands

Kate (1 episode)

Abby Wrigley

Rebecca Curtis (1 episode)

Alyssa Selwyn (1 episode)

Katharine Strachan (32 episodes)

Angela Carver (3 episodes)

Caroline Chandler

Claudia Hoffman (1 episode)

Sara Gemmel

Peggy

Jenny

(1 episode)

Mary

Allison Doherty

Samantha 'Sammy' Woods

Kristen

Claire

Beth Kittridge (18 episodes)

Beth Kittridge

Beth Kittridge

Beth Kittridge

Liddie (19-38) (2 episodes)

Gwen

(1 episode)