Peter Capaldi as The Doctor

Alex Kingston as River Song

Greg Davies as King Hydroflax

Matt Lucas as Nardole

Phillip Rhys as Ramone

Rowan Polonski as Flemming

Robert Curtis as Scratch

Anthony Cozens as Concierge

Chris Lew Kum Hoi as Alphonse

Nicolle Smartt as Receptionist

Liam Cook as King Hydroflax's Body

Nonso Anozie as Voice of Hydroflax (voice)

Clem So as Starline Galactic Villain (uncredited)

William Hartnell as The Doctor (1) (picture) (uncredited)

Patrick Troughton as The Doctor (2) (picture) (uncredited)

Jon Pertwee as The Doctor (3) (picture) (uncredited)

Tom Baker as The Doctor (4) (picture) (uncredited)

Peter Davison as The Doctor (5) (picture) (uncredited)

Colin Baker as The Doctor (6) (picture) (uncredited)

Sylvester McCoy as The Doctor (7) (picture) (uncredited)

Paul McGann as The Doctor (8) (picture) (uncredited)

John Hurt as The Doctor (War) (picture) (uncredited)

Christopher Eccleston as The Doctor (9) (picture) (uncredited)

David Tennant as The Doctor (10) (picture) (uncredited)

Matt Smith as The Doctor (11) (picture) (uncredited)