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.
Length 94 minutes
William Hartnell | Anneke Wills | Michael Craze | Patrick Troughton | Robert Beatty | David Dodimead | Dudley Jones | Alan White | Earl Cameron | Callen Angelo | John Brandon | Shane Shelton | Steve Plytas | Christopher Matthews | Ellen Cullen | Christopher Dunham | Glenn Beck | Roy Skelton | Peter Hawkins | Harry Brooks | Reg Whitehead | Gregg Palmer