While in the cafe. Martin describes the Stargate to Jack O'Neill. He replies, 'Sounds like a good idea for a TV program!' Whilst this is obviously a humorous reference to Stargate SG-1 (1997), the premise was revisited in the Season 5 episode Wormhole X-Treme! (2001), which celebrated the show's 100th episode.
Martin mentions the lizard people which perhaps refers to the Goa'uld but is also a famous conspiracy theory by David Icke that the world is run by an elite cabal of alien lizard people.