Thieves snatch a guest's wallet before he can spend his winnings; the security team assesses a suspicious machine with an unusually high payout pattern; Ed discovers Jillian has been hanging out with singer Mark McGrath.

Danny asks Mike for his technical expertise when someone steals $5 million in diamonds from one of the guests. Meanwhile, the arrival of one of the hotel's most loyal high rollers and his announcement of his pending marriage shocks Sam. Elsewhere, a corporate psychologist visits the staff to get a read on the mental health of Ed's team.