Episode 21 of "Las Vegas"
s01e21 Family Jewels

When five million dollars of diamonds is stolen from a Montecito guest, Danny enlists Mike's technical expertise to determine the techniques used by the mysterious thief. However, Mike's involvement sends him off on a detective tagent as his is determine to solve the great jewel caper. Meanwhile, the arrival of one of the hotel's most loyal high rollers and his announcement of his pending marriage shocks Sam , especially since his fiancí utters the tragic phrase that he "will never gamble again." Determined, she works with Delinda and Mary to make this gambler realize that the true love he seeks actually exist with his longtime assistant. Elsewhere, a corporate psychologist visits the staff to get a read on the mental health of Ed's team.