Julia Brown

Laura

Nathaniel Martello-White

Robert

Charles Aitken

James

Mary Woodvine

Mary

Rupert Turnbull

Isaac

Kaisa Hammarlund

Miranda

Nila Aalia

Heather

James Harper-Jones

Older Isaac

Matthew Allen

The Creature

Stella Gonet

Ava

Lucy Doyle

Dr. Alice Way

Ako Mitchell

Samuel Jacobs (uncredited)