It's Always Sunny in Philadelphia Sweet Dee's Dating a Retarded Person (2005– ) HD online
|Episode credited cast:|
|Charlie Day||-||Charlie Kelly|
|Glenn Howerton||-||Dennis Reynolds|
|Kaitlin Olson||-||Dee Reynolds|
|Danny DeVito||-||Frank Reynolds|
|Kyle Davis||-||Lil' Kevin|
|Rest of cast listed alphabetically:|
|Judith Drake||-||Lil Kev's Mother|
|Nick Toren||-||Guitar Salesman|
Charlie is shown actually playing a song on the piano. Actor Charlie Day grew up learning piano as both his parents were music teachers.
Dennis implies that only he went to elementary school with Dee's boyfriend, despite Dennis and Dee being twins.