Like Doc Brown in Back to the Future, Stillman gets the idea for a time machine when he hits his head.
Asa Butterfield has now worked with both Stark sisters. Sophie Turner in this movie, and Maisie Williams in Then Came You (2018).
Filmed between February and April, 2017 in Salt Lake City, UT and surrounding areas
While at the library Evan (Skyler Gisondo) said he changed his major to psych. One of Skyler's big role was play young Shawn Spencer in Psych (2006).
Some filming was done at the University of Utah.