When Harris dresses as a homeless person to go undercover, Wojo tells him he tried to warn him about that Chrysler stock. When this episode was made, Chrysler was going through severe financial difficulties and was near insolvency.
Dietrich asks Barney if he needs help solving the crossword clue "blank Google". It's an in-joke in that the answer is "Barney". It refers to the long-running comic strip "Barney Google and Snuffy Smith", and of course not the search engine and technology giant.
Inspector Luger comments that Harris has been the "Beau Bridges" of the group. He mixes up the actor with the legendary late 18th and early 19th century English fashion maven, Beau Brummell.