Naturally the PG rating is quite mild by today's standards. Perhaps it was because of the fight scenes?
Also, I recall hearing some mild profanity.

No big deal, but not common for 60s TV shows.
I tried looking it up, saw that Star Trek was one of the first to use "profanity". The Hays code faded by then, the movie industry changed so much! The mid 60s seemed to be a major turning point for television.
Ahh, I'm so fascinated with trivia.

Anyone else hear any in Batman?
Think it was during the "fight scenes" - I recall a couple mild ones in a King Tut and Riddler episode.