The drunk guy on the phone in the year 2000 when Bender arrives to kill Fry is the cryogenicist seen at the end of Season 5's Jurassic Bark (2002), complaining about his hangover from the night before.
When Amy receives the barrage of pop-up ads on her laptop, one says "Watch Comedy Central." Comedy Central aired Futurama (1999) in re-runs and aired this movie edited apart into four separate episodes.
Amy Wong's email address is "awong@marslink.web," Zoidberg's is "zoidberg@freemail.web" and Bender's is "bender@ilovebender.com." Amy and Zoidberg's are fake, but www.ilovebender.com is a real promotional site for the movie.
On the Nude Beach Planet, when Bender extends his solar panel, he comments on not knowing whether photons are waves or particles. This argument has been a centerpiece with physicists for many years with no clear winner.
The time code seen in the Bender tattoo is made of six columns of binary digits. The first three columns show the binary form of the numbers one to six. The last three columns are simply the same digits as the first three in reverse order.