- 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.
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