The music box Veronica's (Kristen Bell) mom leaves plays a variation of The Beatles' "All You Need Is Love".
Veronica's (Kristen Bell) dog in this pilot is different from the one seen in the series. This one is a brown and white American Bulldog, while the later one is a brown American Pit Bull Terrier. When the show got picked up, they decided to recast Backup. This was done to avoid dealing with Backup One's dog trainer, as their lack of preparation for the pilot shoots delayed production a lot.
The Mars' apartment was different in the pilot to how it would appear subsequently. The front door, size and layout of the apartment change. In the pilot, the kitchen has a wall partition between it and the lounge area which disappears later.
The word "snitch" written on the duct tape on Wallace's (Percy Daggs III) chest was actually misspelled--it read "snich." According to the pilot script posted on creator Rob Thomas' website, this mistake is intentional.
The pilot script describes Veronica (Kristen Bell) the following way: "She is not cute. She is sexy. Tough. Prematurely jaded. Angelina Jolie at 17."