Jodie Whittaker

as Cath Hardacre

John Hannah

as Dr. Archie Watson

Blake Harrison

as Karl

Alfred Enoch

as Corporal Jamie McCain

Ashley Jensen

as Debbie Dorrell

Richard Rankin

as Dr. Alex Kiernan

Katie Clarkson-Hill

as Dr. Zoe Wade

Amiera Darwish

as Dr. Laila Karimi

Manjinder Virk

as Parveen Shankar

Elliot Cooper

as Danny Adams