The Ambassadors of Death (1)

Name: The Ambassadors of Death (1)
Director: Michael Ferguson
Released: 1970-03-21
Duration: 25 min
Rating: 7.5
Cast: Ronald Allen, Robert Cawdron, Ric Felgate, Michael Wisher, Cheryl Molineaux

S7 E12 March 21, 1970 0h 25m ★ 7.5

Source:

Overview

While the Brigadier investigates a loss of contact with Mars Probe 7, the Doctor realises signals coming from the probe are of extra-terrestrial origin.