Doogie: We get a lot of homeless people claiming to be other people. Last week a guy came in claiming to be Abraham Lincoln.
Vinnie: You're kiddin'.
Doogie: Seriously. He tried to emancipate Raymond three times.
Doogie's Journal Entry: October 30, 1990... I guess being a good doctor is like playing the blues... sometimes you just have to improvise.
The German episode title is "Otis gibt nicht auf", meaning "Otis Doesn't Give Up".
Though credited, Lawrence Pressman, Mitchell Anderson, Kathryn Layng, Lisa Dean Ryan, Lucy Boryer, and James B. Sikking do not appear in this episode.
Episode title: Doogie Sings the Blues
A play on the title of the 1972 motion picture, Lady Sings the Blues, dramatizing the life of famous blues singer Billie Holiday, as played by Diana Ross.