That's actually the first scene in the episode. The rest is just Brocktoon beating the pedo to death with a tire iron, occasionally taking tea breaks so as to draw it out.
The character of Lynn Belvedere was originally created by Gwen Davenport in her 1947 novel, Belvedere. The following year, the title character was portrayed by Clifton Webb in the film Sitting Pretty. Webb's performance earned him an Academy Award nomination for Best Actor. Sitting Pretty told the story of an arrogant genius who answers an employment ad for a baby sitter for three bratty kids. He accepts such employment because he is secretly writing a novel about a community filled with gossips and busybodies. Clifton Webb reprised his role as Mr. Belvedere in two more movies, Mr. Belvedere Goes to College (1949) and Mr. Belvedere Rings the Bell (1951).