I know that Fonzie's dad appeared once as a sailor. Did Fonzie's dad ever appear again, or was it mentioned that he died in a later season?

Fonzie's dad never appeared again, but he was mentioned in the episode Arthur, Arthur. The episode where Fonzie finds out that he has a step-brother, and that his father died by going over board on a ship. That was the last time he was really ever mention.

~*~FonzFan~*~