The episode "Tornado Days" about a giant tornado called "Old Bob" credits
"Old Bob as himself."
In the episode "Who's Who," we meet a family whose members all have the
middle name Bob, even the daughter. In the closing credits, all the crew
members have the middle name Bob.
Most episodes have individual closing theme music tailored to the subject
and mood of that particular episode e.g. a comical tune for "Just Say No
Fun", Rock 'n' roll for "The Broken Record", poignant for "Heart on a
Chain", romantic for "The Dead Letter," etc. with appropriate background
imagery.