Starring: Jon Pertwee, Katy Manning, Richard Franklin, Roger Delgado

Directed by: Michael Ferguson.

An approaching Alien spaceship is detected on monitoring equipment at UNIT HQ, where the Brigadier is entertaining two visitors - Chinn, a civil servant making a security inspection, and Bill Filer, an American agent sent to discuss the threat of the Master. The Ship lands in England and the UNIT team, joined by Hardiman and Winser from the nearby Nuton power station, meet its occupants: beautiful golden-skinned humanoids called Axons.

Originally transmitted 13/03/71 - 03/04/71.

DVD Extras: Commentary track. Photo gallery. Out takes/deleted scenes. 'Now and Then' featurette about the Dungeoness location. Interview with Michael Ferguson (director). 'Reverse Standards Conversion' featurette.

An approaching Alien spaceship is detected on monitoring equipment at UNIT HQ, where the Brigadier is entertaining two visitors

Dr Who, Sci-Fi, Science Fiction, John Pertwee