In season 1 episode 2, character Kate Wallis is shown eating a bowl of pineapples in milk, a reference to the infamous JonBenèt Ramsey case. This was the last snack JonBenèt ever ate and undigested pineapple was found inside her stomach after her death.
On May 18, 2020, Last Summer was retitled as Cruel Summer.
In episode 5, Harley Quinn Smith's character mentions watching Clerks. Her dad was the director and writer of the film.
Season 2 reunites KaDee Strickland, Paul Adelstein, and Griffin Gluck, who all starred together on Private Practice.