The painting Mozzie uses to cover up the plans was painted by a set decorator in 20 mins.
In the pool scene, it's filmed in the same building as the puzzle scene from Free Fall. In the commentary, it's also mentioned the actors were freezing cold since it was shot in the winter in NYC and the heater on the pool hadn't been turned on ahead of time.
In this episode, Diana's girlfriend's name is revealed to be Christy. In real life, Marsha Thompson's sister is named Christy.