Franz's fake surname translates as "good day", while his real one translates as "bad night."
When Lois comes to the door and asks Frans if he saw Peter, Frans replies with "Is he a great big fat person?" This is a reference to the Silence of the Lambs.
Peter's line about "life finding a way" is a reference to a line spoken by Jeff Goldblum in 'Jurassic Park.'
Chris' birthday February 8th, is his voice actor's Seth Green's birthday.
Peter refers to the German as Mr. Poopinchest, and Mr. Googlesearch.