David Angell and his wife died on an airplane.
 "Goodnight, Seattle", series finale that aired May 13, 2004, featured the birth of Niles Crane and Daphne Moon's son, who is named David in tribute
 In an 1997 episode Angell cowrote for Frasier, a stranger leaves a telephone message for Frasier saying that she will soon arrive on "American Flight 11"

