Xander notes at the beginning of the episode how quiet Sunnydale's undead population has been since the events of the previous episode, but quickly stops to chastise himself for potentially jinxing their good fortune. Buffy and Willow criticized him for doing almost the exact same thing in Buffy the Vampire Slayer: School Hard (1997).
The plot of the episode is similar to that of The Stepfather (1987), where a teenage girl suspects her new stepfather (who is obsessed with "old fashioned values") is a serial killer who marries women, and murders them when they fail to live up to his exceedingly high expectations.
During the episode, Ted and other characters use specific language to tease the audience about Ted's robot personality. Ted uses the phrase "I'm not wired that way" a couple of times, an employee at Ted's workplace describes him as a "machine", and Joyce tells Ted that every home "should have one of him," implying that he is like a house robot.