Xmas Story - Continuity

Continuity

• The other Futurama Christmas episodes, also dealing with Robot Santa, are "A Tale of Two Santas" and "The Futurama Holiday Spectacular" (though Robot Santa is not voiced by John Goodman in these episodes).
• Robot Santa also appears in "Bender's Big Score".
• In this episode it is stated that global warming occurred but was cancelled out by nuclear winter. In "Crimes of the Hot", it is revealed that global warming is still around (and has been quelled by putting a large ice cube in the ocean ever since 2063), while in "A Big Piece of Garbage" the mayor calls global warming a hoax (just like secondhand smoke). Additionally, in "The Luck of the Fryrish", Fry remarks that his father "spent years turning into a bomb shelter", to which Leela replies, "and you guys never had a single nuclear war."
• Zoidberg claims to be cold-blooded (even though he shivers, which cold-blooded animals are unable to do), this fact caused the heat seeking missile to not attack the Decapodian oppression palace in the season four episode "A Taste of Freedom".
• Although it is stated by Professor Farnsworth that French is a dead language, a sign on a store reads "Joyeux Noëx," in Alienese, keeping with the theme of referring to Christmas as Xmas and also in "Teenage Mutant Leela's Hurdles", Pazuzu, The Professor's Gargoyle, speaks French.
• When the characters go to cut down Xmas trees, they only find palm trees. Fry asks why, and Professor responds by telling him that pine trees have been extinct, yet in the scene before, there were forests of pine trees (though these are most likely artificial and only there for skiiers, since they can be hidden and unhidden by spoken command).