Brett Tucker's Character Harry was originally supposed to be American, but at the last minute it was decided he should play the role using his natural Australian accent because the producers thought his character would be more attractive.
Despite not sharing any scenes in the pilot, Alyssa Milano and Chris Payne Gilbert who plays Mac previously worked together on the show Charmed in the second season.
Alyssa Milano and Chris Payne Gilbert formely played together in an episode of Charmed (1998)