When John Mahoney died in 2018, several YouTubers uploaded the scene of him being recorded by Niles as a tribute.
This episode contains a rare example of product placement on Frasier. At Frasier's (Kelsey Grammer) apartment, Roz (Peri Gilpin) says she's going to get a Coke, and then goes into the kitchen and takes a can of Coca-Cola from the fridge, opens it and sips from it. This was the third season of Frasier and the series was becoming popular enough for such things to occur. In subsequent seasons, however, you see no more of it, so apparently the producers decided it wasn't right for the show. The only other products we ever see mentioned specifically, such as BMW, Mercedes, M&M's and Balantine, were integral to the stories/characters and it's unlikely they were product placements.
David Duchovny who played the guest caller in this episode who claims that he and his partner are sexually insatiable for each other. In 2008 Duchovny would admit to being a sexual addict.
The celebrity caller in this episode is David Duchovny. Duchovny plays Tom who, even though he has sex with his girlfriend of six years every morning, every night, and three times a day on weekends, he isn't sure they really have anything else in common.