re: #212 CongoJack
All I remember of TOS are tribbles (and the original movies - Kahn and having go back in time to steal whales).
“Piece of the Action” — wherein they discover a society based around a book about 1920’s Chicago gangsters.
“City on the Edge of Forever” — wherein peace activist Joan Collins has to be run over by a car so she doesn’t keep the US out of WWII and the Nazis don’t win.