Adrian Monk: You've got a serial killer on your hands.
Captain Stottlemeyer: Monk, the woman was strangled. She didn't know any of the other victims. I am not crying wolf until I am 100% sure.
Adrian Monk: This is definitely the same man that killed Frank Pulaski at the toll booth.
Captain Stottlemeyer: A lot of people pay with $10 bills.
Adrian Monk: It's brand-new.
Captain Stottlemeyer: There are a lot of brand-new tens out there right now.
Adrian Monk: The serial numbers are sequential.
Captain Stottlemeyer: What? You remember that?
Adrian Monk: Well, I got a pretty good look at it. The bill at the toll booth ended with 6092B. This is 6093B.
Captain Stottlemeyer: A serial killer.