It’s Always Sunny In Philadelphia Season 16 Revamps Charlie’s Apartment

Frank ends up discovering that the room to the right of the TV is actually a bathroom with a toilet and what looks like a sink. There’s all kinds of stuff jammed in there, as if Charlie used it as a closet and forgot about it, but Frank is more focused on the toilet. Charlie insists that it’s a bad toilet because it “runs all the time,” but given the whole situation they’ve been used to, that’s a pretty ridiculous reason to not use a toilet. This sends Frank looking for more rooms, and the one behind the hot plate turns out to be a giant, empty room. It’s probably the main bedroom of the apartment, and it’s sitting there empty. Frank is furious once more because they could have been living in less cramped quarters, but Charlie seems to like things the way they are. 

In the end, Frank agrees to board up both doors once more in a deal with Charlie, returning things to the way they’ve been for 14 seasons, but the existence of the two rooms ends up creating more questions than answers. Way back in season 1, more of those doors were open, and there’s some potentially conflicting information.