When Dexter is throwing up in the toilet, every time the angle changes, the toilet seat is either up or down.
Dexter had a VHS tape of Indecent Proposal in his childhood room. That film came out in 1993, after Basic Instinct, which was the film premiere he was attending later that evening.
Dexter leaves an answerphone message for Emma inviting her to the UK premiere of Bajos instintos (1992), however, the film opened in the UK on 8 May, and therefore did not have a premiere screening on 15 July.
At 27:52, when Emma and Ian are walking after leaving the restaurant, Emma says she could "Fly a commercial aircraft". Ian answers, "Bet", which was not really said in the 90s.