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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.
Info
- verified Status: Ended
- person By: Verity Lambert
- calendar_month Release Date: 1970-03-21
- video_camera_front Companies BBC
- tag Season: Season 7
- timer Episode Runtime: 25 Mins
- star Rating: 7.2 / 10
- visibilityViews: 2 views
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