- as Adrian Monk
- as Natalie Teeger
- as Daniel Thorn
- as Sheryl Thorn
- as Lewis
- as Teresa Telenko
- as Capt. Leland Stottlemeyer
- as 2nd Cop
- as Dealer
- as Croupier
- as Roberto the Cook
- as Paparazzi Photographer
- as Bartender
- as Lt. Randall Disher
- as 1st Cop
- as Mr. Hooper
- as Wanda the Barfly
- as Gambling Woman
- as 2nd Barfly
- as Gambler
- as 1st Barfly
- as Vegas Showgirl
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Watch "Monk > Mr. Monk Goes to Vegas":