In this episode, Cory goes back in time to the 1950's, and people think he is a spy. This episode has references to a lot of big time, popular things around the 1950's-60's-70's.
This episode is really weird, but that doesn't always equal badness. This is one of the most surreal episodes of the whole series. Is it the worst? No, just strange. It had a lot of good lines from most characters. I can't say I enjoyed the plot a whole lot. But for what it is worth, this is an enjoyable episode most fans will think is strange, but most should like it