Zack finds out he's part Neanderthal, so he and Matt spark up Dr. Oh to trip back to when six different species of humans all walked the Earth at the same time! It's a human family reunion that reveals why Homo Sapiens are the only ones still partying.

Dr. Oh is furious that Matt and Zack are watching a TV show about how aliens helped ancient Egyptians, so he takes them back 3000 years to show them how impressive the Egyptians truly were - no aliens required. They also find out what "ithyphallic" means.