Not many television shows last longer than a couple of seasons, so when you find one that manages to run for a whopping fifteen seasons and is still going strong, you know it's doing something right. Yes, we are of course talking about It's Always Sunny in Philadelphia.
The show follows a group of misfit friends, "The Gang", who run a very unsuccessful Irish bar in South Philadelphia.
It's fair to say that they all like to get up to no good - from excessive drinking and substance abuse to blackmail and conspiracies, there's never a dull moment for The Gang.
With any show that has been around as long as It's Always Sunny in Philadelphia, it's no surprise that there have been many many faces come and go from Paddy's Pub. Whether they have an impact on major storylines, or are just there for a bit of light relief, it's almost impossible to remember everyone we've met.
The following characters have only appeared in one episode of the show (so far). All you have to do is put a name to the face. Let's see how you score on this It's Always Sunny character quiz!