There are numerous references to ET the Extra Terrestrial (1982): kid Ray pretending to be sick to stay home to play with the baby Dominator; Ray and Zari finding the baby Dominator in the closet with stuffed animals is similar to when the mother sees ET among the stuffed animals in the closet; feeding "Gumball" candy and the wind causing the swing to move behind Sarah,the episode takes place on Halloween which is also a segment in ET; government agents experimenting on the baby Dominator is similar to the government agents experimenting on ET; and the scene where Ray, Zari and kid Ray with the baby Dominator fly across the Moon silhouetted in the process copying the iconic scene from ET.
Dr. Martin Stein's (Victor Garber) newly born grandson is named Ronnie. Ronnie was the original other half of Firestorm along with Dr. Stein in The Flash (2014).
Zari says the FDA outlawed all candy by 2042. In the S1 episode 14 episode River of Time (2016) Mick wonders why all the snacks from 2166 are sugar-free.
When Nate (Nick Zano) is cleaning the Delorean he comments "See now this, this is a time machine". This is a reference to the movie Back to the Future in which a Delorean functions as a time-machine. Also washing the car wearing sweats is a spoof on the character Biff from the movie.
Amaya says to the mother Dominator who is attacking Nate "Get away from him you bitch" copying the iconic line from Aliens (1986) when Ripley battles the Xenomorph Queen threatening Newt "Get away from her you bitch".