Trivia: While he's in his his room at the NASA base, David asks when "Starsky and Hutch" will be broadcast. Director Randal Kleiser also directed Starsky and Hutch (1975).
Trivia: Sarah Jessica Parker said in 2018 that her role was 'just a paycheck' and she can't remember what the film was about or who she played.
Trivia: Paul Reubens voices Max - he is credited as Paul Mall. He also played Pee-wee Herman in the TV and film series.
Answer: I can't directly answer this, but I was watching this movie just now, and didn't take in the girl at the beginning's (Jennifer's) name, so when Sarah Jessica Parker, Carolyn, appeared I then spent the rest of the movie assuming that she was going to turn out to be the girl he was crushing on in 1978, especially when Carolyn even told him he was cute (which is kind of a weird thing for a 20-year old to say to a 12-year-old if there isn't a plot reason for it). I do wonder if that was in fact the originally intended idea that was changed for whatever reason before the movie was completed, and if perhaps he was meant to go back to 1978 with the knowledge that she found him cute and therefore a new-found confidence to ask 12 year-old her out.
MrDannyDetail