The title is a reference to the 1970s television show Welcome Back Kotter.
Peter refers to an Owl called "Doctor Hoo". This is a reference to the long running British Science Fiction series Doctor Who.
Carter describes his penis by saying, "Joe McCarthy was on a rampage, looking for anything red". This is a reference to the U.S. senator of the same name who was famous for making claims that there was a large number of Communists and Soviet spies in the United States during the Cold War.
Carter refers to the film Taken when explaining how he met the girl on the boat. He indicates that the girl was a girl who was not saved by Liam Neeson.