For one thing, Charlie finally got his way and slept with the waitress. As if that weren't enough, Dennis revealed that he had a secret family in North Dakota. When the episode (and season) ended, Dennis decided to move away and spend time with his family.
It seemed like a perfect season capper and one that would set up some fascinating jokes for Season 13, but that may not be the case. Glenn Howerton, the actor that plays Dennis, has just signed on for an NBC pilot alongside Patton Oswalt. Busyness aside, he also suggested he may not return to the show for "creative and personal" reasons.
Speaking with Uproxx, Howerton said he has no idea whether or not he'll return to Always Sunny:
It's a little complicated…. It's not entirely certain whether I am or am not. I might be. I might be, but I might not be. That really is the truth. Just to be clear, to dispel any potential weirdness, it has nothing to do with my relationship to anyone on the show or Rob or Charlie or anyone like that. It's partially a creative and personal decision. We may be taking an extended hiatus between season 12 and season 13. So I'm certainly staying open to the possibility of doing more, but there is a possibility that I will not.
The show has been renewed for Season 13 and Season 14, meaning it's tied with Ozzie & Harriet as the longest running live-action comedy in TV history.