The recurring gag of Peter throwing people out of a castle window, Peter says it's a reference but not what to. It is a reference to Braveheart (1995).
Peter's list of sitcoms which start with someone showing up at the door in the pilot includes Dads (2013). It starred Seth Green, who stars in this show as Chris and was created by two of 'Family Guy's' senior writers.
Kevin James interrupts Peter's list of sitcoms which start with someone showing up at the door in the pilot when he lists Un gars du Queens (1998). It starred the real Kevin James.
Peter's list of sitcoms which start with someone showing up at the door in the pilot includes Aliens in America (2007) and United States of Al (2021). Both star Adhir Kalyan as a Pakistani immigrant moving to America, and thus the person showing up at the door in question.