The role of Dr.Vadgers is revealed after the end-credits as Glenn Quagmire.The 'womanizer' from another Seth McFarlane series :'Family Guy'
When Roger is sitting on his throne you see two lions and a bird, same as the logo for the rock band Queen.
The memorial for the Great Bus Crash of 2010 is a reference to the bus crash that happened in the season 6 premiere that killed 96 people.
Stan uses Dontello's Abortion Juice and drinks Joe Dontello's Whiskey.
Hayley does not appear in this episode but is heard offscreen.