Matthew Perry was so sidelined by alcohol and painkiller addiction that he doesn't remember a large chunk of Friends, he recently revealed to BBC Radio 2. Asked to name his least favorite episode of the sitcom, Perry responded, "Oh, my goodness. I think the answer is: I don't remember three years of it," per Today. "So, none of those. A little bit of the time I was a little out of it, yeah. ... My answer to your question is: somewhere between [Seasons] 3 and 6." (Speaking of Matthew Perry, we have some bad news for you, Friends fans.)