Kate says: "We don't need an exterminator, we need Sigourney Weaver." Aliens opened 18 July 1986 in USA and this episode aired 4 May 1987, by which time it's a pretty much a safe bet to say that pretty much everyone identified Sigourney Weaver as the universe's premium "bugkiller" thanks to Aliens, not Ridley Scott's Alien (1979).