Trivia: Ted Cassidy, best known for his role as Lurch in the hit TV series "The Addams Family", did the opening narration for the show as well as the vocal effects for the Hulk. Sadly, Ted Cassidy died during production of Season 2. The Hulk's vocal effects were then done by actor Charles Napier for the rest of the show. Ted Cassidy's voice was still used for the opening narrations of all seasons.
Trivia: The pilot crests (worn by Richard Hatch and Dirk Benedict, among others) on their collars were actually U.S. Army Military Intelligence Class A uniform crests.
Trivia: Robin Williams improvised so much of his dialogue that the show's writers finally stopped writing his lines and just left blank space in the scripts with cues and prompts for him.
Suggested correction: I'm researching Mork and Mindy for a feature. Contemporary interviews say Robin Williams was given leeway to improvise but this was only about 5% of an episode. These were probably done in rehearsals and incorporated into the final scripts. It would be impossible to film each episode if Williams wholly improvised as the cameras wouldn't know if he was going to hit his marks (i.e. where any actor needs to be so is in frame) and for other cast to react to. So partly true but not the whole story.