The balance between innocence and inappropriateness holds the key to the biggest laughs in “The Nightman Cometh,” perhaps the definitive of all It's Always Sunny in Philadelphia episodes.

adding a picture of the full Always Sunny cast onstage during “The Nightman Cometh.” It goes without saying that every one of ...

The It’s Always Sunny in Philadelphia star recently got ... Alongside Season Four’s legendary musical episode, “The Nightman Cometh,” Olson also cited Season Three’s “Dennis and ...