The image on Roy's t-shirt is the "kill screen" from level 256 of the Pac-Man arcade game. When the game was only available in arcade cabinets it lacked the memory (RAM) to display the entire screen, causing the right half of the maze to become corrupted.
Recording artist Tino Ghost wrote a song based on the Richmond character. The song, "Richmond Syndrome", was released on his third album "3".
Richmond's real name is shown to be "Richmond Avenal".
The song that Roy sings at the beginning of the episode is "Another Brick in The Wall Part 2" by Pink Floyd. The song was released on the lead single of the band's 10th Studio album "The Wall". The song's lyrics "We don't need no education..." might be considered a reference to Roy's supposed lack of education.