It's Always Sunny in Philadelphia

Dennis and Dee decide whether to pull the plug on their ailing grandfather; the gang learns of Pop-Pop's history as a Nazi; Mac, Charlie and Frank set off in search of Pop-Pop's spoils from the war.

In an effort to sever all ties with Maureen, Dennis and the gang plan to crash Maureen's wedding and wreak havoc.

After Charlie and Dee invade the world of the wealthy, they find romance within, but Mac, Dennis and Frank try to get in on the action.

The gang goes to a therapist's office to work through their mountain of issues, and Dennis' psychology is exposed as abnormal.

The gang rallies around Charlie's mum as she battles cancer; Mac, Charlie and Dee struggle with their faith; Frank loses his memory and his mind in a quest for buried treasure.

Frank cleans up so he can help out his old company with one last big merger; an unwritten rule of the bar gets the rest of the gang caught up in a case of mistaken identity.