Martin Shaw

as Robert Kingsford

Katie McEwen

as Judy Enshaw

Connor McIntyre

as Terry Harker

Niamh Cusack

as Dr. Christine Fletcher

David Partridge

as Dr. David Scobie

Paul Warriner

as Dr. Stuart Phelan

David Harewood

as Dr. Mike Gregson

Jane Slavin

as Cathy Jordan

Kim Vithana

as Yvonne Silver

Dominic Mafham

as Dr. Andrew Argyle