Ian Tracey (Johnny K.) also appeared in The X-Files (1993). In the German dub of this episode, Marcia Strassman (Betsy Fields) is dubbed by the same voice actress as Dana Scully Gillian Anderson, the second main character of that series (also German version).
Highlander fans jokingly refer to this episode as the "Home Alone" episode, since Duncan uses a nearly identical trick to lure out Johnny K that Kevin uses on the Wet Bandits in Home Alone to convince them that the house was indeed occupied.