"The Ricardos Visit Cuba" - I Love Lucy
This episode isn't necessarily inappropriate or controversial, but there came a point where it didn't feel like it should be aired (apparently.) In the episode, Lucy, Ricky, and Little Ricky went to Cuba to visit Ricky's, Uncle Alberto. They wanted to get on his good side since he wasn't happy with the fact that Ricky married Lucy and not a Cuban woman. After the US went south with Cuba in the early '60s, the episode was pulled.