Doctor Who - Planet of Evil (3)

Seizoen: 13 - Aflevering: 7 / 410 - Eerst uitgezonden: 11 oktober 1975 - Episode ID: 76157

The edge of the known universe, in the year 37,166. The TARDIS lands on the planet Zeta Minor, where a Morestran survey team has suffered a series of horrific killings. What dark secret does the team leader keep - and will the planet permit anyone to leave?