Torri Higginson

as Sandra Sullivan

as Claire Malone

as Liz Sterling

as Marie Cook

as Charlotte Singer

as Marion

as Dr. Michelle Kessler

as Natalie Lawson

as Commander Truffault

as Opening Narrator (voice)

as Self

as Dr. Kaycee Leeds

as Evelyn

as Evelyn

as Elizabeth Weir

as Chief Geiger

as Alex

as Lorraine Healey

as Elizabeth Weir

as Jordan Hampton

as Dr. Katie Arlen

as Ms Sheila Newlands

as Kate

as Abby Wrigley

as Rebecca Curtis

as Katharine Strachan

as Angela Carver

as Caroline Chandler

as Claudia Hoffman

as Sara Gemmel

as Peggy

as Jenny

as Dr. Elizabeth Weir

as Mary

as Allison Doherty

as Samantha 'Sammy' Woods

as Kristen

as Claire

as Alyssa Selwyn

as Beth Kittridge

as Beth Kittridge

as Beth Kittridge

as Beth Kittridge

as Liddie (19-38)

as Gwen

as Georgia