Terror of the Vervoids (4) Doctor Who : Season 23 Episode 12
TV-PG BBC Television 25m int(0)
Aired: November 22nd, 1986 @ 5:15 PM EST on BBC Television
With factions vying for control of the ship, the Vervoids are found to be responsible for the many disappearances. Only the Doctor sees the fundamental but missed point as to why they can't be reasoned with or why they can't be allowed to arrive on Earth.