The Doctor and Ruby Sunday have faced the Bogeyman, fought against Maestro, and survived the battlefield of Kastarion 3. In the epic two-part season finale, The Doctor and Ruby arrive at UNIT headquarters on a top-secret mission and a long-buried secret awaits…
Ncuti Gatwa
as The Doctor
Millie Gibson
as Ruby Sunday
Jemma Redgrave
as Kate Lethbridge-Stewart
Yasmin Finney
as Rose Noble
Alexander Devrient
as Colonel Christofer Ibrahim
Lenny Rush
as Morris Gibbons
Genesis Lynea
as Harriet Arbinger
Aidan Cook
as The Vlinx
Nicholas Briggs
as The Vlinx (voice)
Susan Twist
as Susan Triad
Fela Lufadeju
as Bailey Sinclair
Bonnie Langford
as Melanie Bush
