Doctor Who: "Paradise Towers"

'''"Paradise Towers." Doctor Who.''' Nicholas Mallett, dir. Stephen Wyatt, script. UK: BBC Colour, Season 24, four weekly parts 5-16 Oct. 1987.

See for robotic killer cleaner-robot(s), "a robotic killer crab," and other mechanical threats in a thoroughly threatening environment (quoting Wikipedia entry, our source for the annotation).