Ncuti Gatwa
The Doctor

Millie Gibson
Ruby Sunday

Susan Twist
Susan Triad / Tea Lady / Comms Officer Gina Scalzi (uncredited) / Ambulance / Pe...

Michelle Greenidge
Carla Sunday

Angela Wynter
Cherry Sunday

Jemma Redgrave
Kate Lethbridge-Stewart

Anita Dobson
Mrs Flood

Bonnie Langford
Melanie Bush

Yasmin Finney
Rose Noble

Alexander Devrient
Colonel Ibrahim

Aidan Cook
The Vlinx

Nicholas Briggs
The Vlinx (voice)

Lenny Rush
Morris Gibbons

Aneurin Barnard
Roger ap Gwilliam / Roger ap Gwilliam (archive footage)

Amol Rajan
Amol Rajan / Amol Rajan (archive footage)

Genesis Lynea
Harriet Arbinger

Fela Lufadeju
Bailey Sinclair

Tachia Newall
Colonel Winston Chidozie

Jasmine Bayes
Corporal Alice Sullivan

Gabriel Woolf
Sutekh (voice)