Although they had met during the 1970s when they were both teen idols, David Cassidy and Leif Garrett became close friends while making this film.
The Wikipedia website states: "[Director Carl] Reiner complimented Sofia Coppola on her costuming work for the film, noting that she was only seventeen years-old during initial production. Coppola had to research for the 1970s as she had not lived through the period, and also developed costumes for two other periods - the future in the year 2171, and the future after the time-travelers returned home and changed the culture."
Cast and crew members from the 1970s period wore their own 1970s era clothes and brought in their on 70s items for props to assist the movie's due to the picture's small and restricted production budget.
Originally, the woman in the porno booth was going to be topless except for suspenders over each breast. When Julie Brown was cast, she got them to change it to her wearing a bikini top.
The picture was shot in twenty-five days according to the film's audio-commentary.
Martin von Haselberg: The husband of Bette Midler as Agent 1 and billed as "Martin Von Haselberg of The Kipper Kids".