In a conversation between Elizabeth Corday and her mother, we learn that the breed of Dr Robert Romano's dog is Bouvier des Flandres; a Belgian working class dog bred to work with cattle.
Two-time Tony Award winner, John Cullum, shows off his singing chops in this episode with "They Call the Wind Maria".
John Cullum is going through his wife's record collection and talks about her taste in music and says "I like a good showtune myself." He should - he has been in many a production that had him sing, including films like "1776" and an episode of "Quantum Leap" where he portrayed an actor in the lead of "Man of La Mancha" (episode "Catch a Falling Star")
The duet being sung in the piano bar is "I Remember It Well" from the movie Gigi (1958).