Revealing mistake: At Cafe Nervosa, after Niles has had a mini-breakdown, he has shed his clothes, boxers and all, all over the place and is supposedly naked in the corner with only a newspaper for privacy. When Frasier has him stand up to wrap aprons around him, one can see that David Hyde Pierce is actually wearing light-coloured briefs.
Frasier (1993)
1 revealing mistake in Murder Most Maris - chronological order
Starring: Kelsey Grammer, David Hyde Pierce, John Mahoney, Jane Leeves, Peri Gilpin
Sleeping with the Enemy - S3-E6
Character mistake: Noel Shempsky (the supposed Star Trek Nerd) attributes the quote "The needs of the many outweigh the needs of the few or the one" to James T. Kirk, when it was Spock who said it. (00:03:50)
Selling Out - S1-E9
Frasier: Roger, at Cornell University they have an incredible piece of scientific equipment known as the Tunneling Electron Microscope. Now, this microscope is so powerful that by firing electrons you can actually see images of the atom, the infinitesimally minute building blocks of our universe. Roger, if I were using that microscope right now, I still wouldn't be able to locate my interest in your problem.
Trivia: John Mahoney plays Kelsey Grammer's father in the series, even though in real life he's only 15 years older than Grammer.
Question: There's probably an obvious answer to this but is there any actual in-show significance to the 'Tossed Salads and Scrambled Eggs' song heard at the end of every episode? I ask mainly because I remembered there was one show in particular where Frasier unintentionally scars Lilith emotionally and pretty much cements the end of their relationship over a misunderstanding about scrambled eggs. Were there any similar conflicts over a tossed salad?
Answer: In the last episode, they explained that Tossed Salad and Scrambled Eggs is a metaphor for the mixed-up people to whom Frasier dispenses his radio psychiatric advice.