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