Roz's returning to the job after quitting and pretending that she never quit: a George Costanza and Larry David strategy. George did it on "Seinfeld" Episode 2.7, "The Revenge". Larry David did it in real life: he was an unsuccessful, frustrated writer on "Saturday Night Live," who angrily quit his job but showed up the next day as if nothing had happened. (Tjn - 09/21/2022)
The "soothing" DVD that Niles (David Hyde Pierce) chooses at Frasier's (Kelsey Grammer) is The Mikado (1939).
The title is from the London West End play "No Sex Please, We're British" written by Alistair Foot and Anthony Marriott in 1971. Though it was dismissed by the critics, it still ran for almost ten years.
Martin comments on Niles and Daphne's assembly of high-tech gadgets for getting pregnant: "In my day, it was simple: girl would put on something slinky, guy comes home, has a couple of pops, throws some Dean Martin on the hi-fi, and bim-bam-boom, you're lightin' a Lucky." The "Lucky" refers to Lucky Strike cigarettes.