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Danny finds his late father s girlfriend (JoBeth Williams), who s in dire financial straits; Sam groans at her brother s romance with Monica, whose bean counter wreaks havoc on all. Rihanna has a cameo. Olivia: Sarah Clarke. Penny: Rachael Leigh Cook.

Danny and Monica team with the FBI to prep security to protect a priceless gem on display at the Montecito. Meanwhile, some of the team are wowed by the magic of illusionist Criss Angel (who plays himself).

Dean Cain returns as Sam s husband in this episode, which finds the Montecito facing the threat of a hostile takeover. Meanwhile, Danny investigates when Mike is mugged by a mysterious ski-masked thug.

Danny and Ed investigate after diamonds are stolen during a Fat Joe music-video shoot, and they end up consulting an amateur sex video to unearth clues to the crime. Elsewhere, a suspicious craps player keeps the team busy.

When an eye-opening $2.9 million irregularity is discovered in the casino s auditing report, the ensuing investigation points to the late Monica Mancuso as the culprit. Meanwhile, Danny s former marine sergeant (Dale Dye) is signed on as a staffer.

Monica s friend (Sarah Ann Morris) finds a finger in the Montecito s buffet bounty. She doesn t want to sue, but she does want Danny. Meanwhile, Ed and Danny investigate the appearance of the digit; and Sam runs afoul of a tough customer (Ed Begley Jr.).

One of Sam s wealthiest clients plans to get married at the Montecito in a multimillion-dollar wedding that will make Donald Trump s nuptials look like “hot wings and Schlitz.” But complications arise when the $100,000 wedding dress goes missing.

Romance begins to bloom between Danny and Delinda, to their utmost surprise. But keeping the relationship tight-lipped proves difficult, particularly when Jillian (Cheryl Ladd) flies in Delinda s old college flame (Shawn Christian).