First episode to show Angela's new computer screen.
This is the 2nd time that Andy Umberger has guest starred in a series starring David Boreanaz. The first time was in the season 1 of Angel (1999), titled "I Fall to Pieces."
You can see "Rodney" on the coveralls worn by the Auto Detailer. But the character is only listed as "Auto Detailer" in the credits.
When Booth enters his office and chats with Hacker, he's carrying a Pittsburgh Steelers (football team) coffee mug. However, it's been established that Booth is a Philadelphia Flyers (hockey) fan. It's interesting that he's not a Philadelphia Eagles (football) fan instead.