Fair rating?Doctor Who· Season 7 · Episode 12
The Ambassadors of Death, Part One
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.
Streaming on (US) 
See all
#16In Season 7of 25 rated episodes
#323All-timeof 700 rated episodes
−0.1vs season avgSeason 7 averages 8.8
1970First airedMarch 21, 1970
Guest stars
Derek Wareas Unit Sergeant
Ronald Allenas Ralph CornishGordon Sterneas Heldorf
Derek Wareas Astronaut
Robert Robertsonas CollinsonCarl Conwayas Control Room Assistant
Steve Petersas Astronaut
Steve Petersas Lefee
Michael Wisheras John Wakefield
Geoffrey Beeversas Private Johnson
Cyril Shapsas Lennox
Peter Hallidayas Alien VoicesRay Armstrongas Grey
Tony Harwoodas Flynn
Crew
Michael FergusonDirector
David WhitakerWriter
Malcolm HulkeWriterTrevor RaylWriter