When Sara says 'bizarro me'. She is relating to the DC villain of Bizarro who is a Kryptonion clone and complete opposite to DC superhero, Superman / Supergirl. In the Supergirl series Cat Grant gives this name to the Supergirl lookalike.
This is the first and only Arrowverse episode to not have any guest stars.
The episode title is borrowed from a 70's Saturday Morning show that featured a family stranded in a prehistoric setting.
When Jax meets the image of Gideon as a female human in Rip Hunter's mind, he remarks that he pictured her as a redhead. This is possibly an allusion to Arthur Darvill's previous role in "Doctor Who", where redheaded actress Karen Gillan played his wife.
Dr. John Dolittle is a physician in early Victorian England who discovers that he has the ability to talk to (and understand) animals.