The Doctor's TARDIS lands at the Snowcap space tracking station in Antarctica in December 1986. A routine space mission starts going wrong. When the base personnel's suspicions are roused, the Doctor informs them that the space capsule is being affected by the gravitational pull of another planet — a tenth planet in the Solar system.
as The Doctor (1)
as Polly
as Ben Jackson
as The Doctor (2) (uncredited)
as General Cutler
as Barclay
as Dyson
as Schultz
as Williams
as Terry Cutler
as American Sergeant
as Tito
as Wigner
as Radar Technician
as Geneva Technician
as R/T Technician
as TV Announcer
as Cybermen (voice)
as Cybermen (voice)
as Cyberman
as Cyberman
as Cyberman
