Who is Charlie Kelly's real father? 

True or False: The Waitress's real name is Nikki Potnick. 

Season 1 Episode 4, "Charlie Has Cancer" 

Season 2 Episode 7, "The Gang Exploits a Miracle"

Season 3 Episode 13, "The Gang Gets Whacked: Part 2"

Season 4 Episode 1, "Mac and Dennis: Manhunters"

Season 3 Episode 10, "Mac Is a Serial Killer"

Season 5 Episode 7, "The Gang Wrestles for the Troops"

Season 4 Episode 4, "Mac's Banging the Waitress"

They want her to determine who should wash the dishes

They want her to teach Charlie how to read

An advanced quiz to test your knowledge of It's Always Sunny in Philadelphia.