The Tenth Planet
- Category: Season 4
- Written by astoller

PRODUCER | WRITER | SCRIPT EDITOR | DIRECTOR |
| Innes Lloyd | Kit Pedler Gerry Davis | Gerry Davis | Derek Martinus |
| REGULAR CAST The Doctor - William Hartnell Anneke Wills - Polly Michael Craze - Ben | GUEST CAST Robert Beatty - (General Cutler) Dudley Jones - (Dyson) David Dodimead - (Barclay) Alan White - (Schultz) Earl Cameron - (Williams) Shane Sheldon - (Tito) John Brandon - (American Sergeant) Steve Plytas - (Wigner) Christopher Matthews - (Radar Technician) Reg Whitehead - (Krail) Harry Brooks - (Talon) Gregg Palmer - (Shav) Ellen Culler - (Geneva Technician) Glenn Beck - (TV Announcer) Christopher Dunham - (R/T Technician) Callen Angello - (Terry Cutler) Harry Brooks - (Krang) Reg Whitehead - (Jarl) Gregg Palmer - (Gern) Roy Skelton, Peter Hawkins - (Cybermen Voices) Patrick Troughton - (The Doctor) - Uncredited |
SYNOPSIS
Many aeons ago, Earth's twin planet, Mondas, drifted away to the edge of space. Its inhabitants grew weak, so their scientists created spare parts for their bodies. Limbs and organs were slowly replaced by metal and plastic, and emotions were removed. The Cybermen were born.
The TARDIS lands at the South Pole Tracking Station late in 1986, just as a routine space mission starts going wrong. When the base personnel's suspicions are raised, the Doctor informs them that the space capsule is being affected by the gravitational pull of another planet. A tenth planet.
As Mondas returns to the solar system, the Doctor warns that a visit from Mondas's inhabitants is imminent. The Cybermen want Earth's power and resources for themselves. Only the Doctor offers the base any hope against these silver giants. But is this one battle too many for the ailing time traveller?

