The High School Reunion - S7-E12
Continuity mistake: Mac puts his name tag on over his lapel, but when Dennis walks away, Mac's name tag has moved and is no longer over his lapel.
It's Always Sunny in Philadelphia (2005)
1 continuity mistake in season 7 - chronological order
Starring: Danny DeVito, Charlie Day, Glenn Howerton, Kaitlin Olson, Rob McElhenney
Genres: Comedy
Other mistake: In the opening of this episode the screen reads "3:50pm On a Wednesday." When Gino (Frank's Brother) is reading the letters meant for Shadynasty, he says "Meet me at the airport, Friday, at 5:00, Terminal C." The gang and Gina then go along to the airport that very afternoon - a Wednesday - to try and meet Shadynasty and get her and Frank back together. And of course she is there, despite it being a Wednesday, not a Friday.
The Gang Gets Held Hostage - S3-E4
Trivia: When Frank pulls out the gun on the roof, he says "Yippee-ki-yay Mr. Falcon", a nod to Die Hard 2, the TV version of which infamously had the word "motherfucker" badly dubbed over with "Mr. Falcon."
Bums: Making a Mess All Over the City - S3-E14
Question: Does the junkyard cat actually belong to one of the actors or is that a whole different deal?