The Once and Future Bartman Part Three: Together Again For the First Time/References

Continuity

 * Professor Frink's time machine is from "Son of Homer's Odyssey".
 * Bartman and Houseboy traveling back to "The Once and Future Bartman Part One: Alpha and D'oh-Mega".
 * Professor Frink's time machine from Springfield Up is seeing when Bartman and Houseboy travel back in time.
 * Bartman thought Comic Book Guy was "The Collector" which he is in "Treehouse of Horror X".

Cultural references

 * Dr. Who's time machine is seeing when Bartman and Houseboy travel back in time.
 * The DeLorean time machine is seeing when Bartman and Houseboy travel back in time.
 * The billionaire megalomaniac president is possible a references to Donald Trump.
 * Comic Book Guy still using AltaVista instead of Google.

Goofs

 * AltaVista is disconnected.