David Tennant

as The Doctor

Lindsay Duncan

as Captain Adelaide Brooke

Peter O'Brien

as Ed Gold

Sharon Duncan-Brewster

as Maggie Cain

Gemma Chan

as Mia Bennett

Aleksandar Mikic

as Yuri Kerenski

Michael Goldsmith

as Roman Groom

Cosima Shaw

as Steffi Ehrlich

Joplin Sibtain

as Tarak Ital

Alan Ruscoe

as Andy Stone

Lily Bevan

as Emily

Max Bollinger

as Mikhail

Charles De'Ath

as Adelaide's Father

Rachel Fewell

as Young Adelaide

Anouska Strahnz

as Ulrika Ehrlich

Zofia Strahnz

as Lisette Ehrlich

Paul Kasey

as Ood Sigma