The Mysterious Planet (4) Doctor Who : Season 23 Episode 4
TV-PG BBC Television 25m
Aired: September 27th, 1986 @ 5:15 PM EST on BBC Television
All those on Ravolox are in exponentially greater peril than anyone can comprehend. If anything in the entire universe is to survive, it may come down to the Doctor arguing against machine logic over the value of life.
