Trivia

Was one of the last surviving cast members of The Flintstones (1960).

Served in the U.S. Air Force during World War II and saw combat action over China.

He was never interviewed and rarely made any public appearances, but he did have a guest spot at BotCon 2001 in Durham, North Carolina.

Stephenson was one of the known voices of the classic shows to reach the 21st century while voice acting.

Hanna-Barbera based the character of Mr. Peevly from Help!... It's the Hair Bear Bunch! (1971) on Joe Flynn and even hired him to play the role. However, he was replaced by John Stephenson because as Joseph Barbera put it: "John could do a better Joe Flynn than Joe Flynn.".