Easter Egg - On the wall of the arcade, near the office, is a small replica of Captain America's original shield, with the phrase, "Old Soldiers Never Die".
Lou Ferrigno was the only cast member to film any scenes on location in New York.
The shows creator Kenneth Johnson said they had Lou Ferrigno (Hulk) run through New York City just to see if anyone would notice. so a lot of the civilians weren't actors or extras they were real New Yorkers.
A thug says to David, "You really don't want to make me angry, and I really don't want to make you angry," as a nod to the show's most famous line set up from the pilot episode, "Don't make me angry... you wouldn't like me when I'm angry."
Guest star Robert Alda (Jason Laird) will return as a different character in My Favorite Magician (1979).