The Visitation (4) Doctor Who : Season 19 Episode 16
TV-PG BBC Television 25m
Aired: February 23rd, 1982 @ 5:15 PM EST on BBC Television
With Tegan and Richard under alien control, and the manor sealed against anyone leaving or entering, it's a question whether or not the Doctor can get to London before the Terileptils release their improved strain of black death upon the world.
