Corrected entry: Martin says in the pilot "two years ago I'm sailing toward retirement and some punk robbing a convenience store puts a bullet in my hip." In another episode he says to Niles "sometimes when life closes a door, you need to kick one open...of course last time I did that on a raid, the guy on the other side shot me in the hip."
Corrected entry: Early in the run of Frasier, Lilith arrives in Seattle for a visit. Niles is very cold with her, because he says "at our wedding when Maris was reciting her vows, which she wrote herself, vows of love from the heart, I distinctly heard snickering." Niles had been married to Maris for 15 years when they separated during the 3rd or 4th season. How then could Lilith have been at their wedding? At that time Frasier would have not have even known Lilith, and was probably involved with Diane Chambers.
Correction: He wasn't married to her for 15 years he started dating her 15 years ago, however they married in 1986, per season 1 episode 17: A Mid-Winters Night Dream. Therefore Lillith and Fraiser were in fact dating at the time.
Corrected entry: Daphne's brother Simon, who turns up in several of the later seasons, has no trace of a Manchester accent. It sounds like a fake Cockney, London accent. Surely the casting people could have found someone from northern England to fill the role.
Correction: My family comes from Greater Manchester & my sister moved to Gloucestershire a number of years ago & now she (& my niece) speaks with a broad Gloucester accent.
Correction: Martin never said that second quote on the show. He did tell Frasier that he (Martin) was afraid after witnessing something as a police officer, and for a long time he was scared to go down a blind alley or through a door but he finally faced his fear by "walking right through the next door I came to...the fact I got shot was completely a coincidence."