The only episode where Pussy's wife is referred to as Angela. She is referred to as "Angie" in all other episodes.
The song played during the ending credits is "I Feel Free" by Cream.
When Tony first talks to Isabella he walks through a garden arch that is bright white. Later when he is talking to Cusamano the same arch is seen but it's brown wood and very weathered-- another hint that Isabella was all in Tony's head.