When a mysterious stranger, Martin (Tyler Hoechlin), wanders into the Camden home and spends the day with the family everyone assumes he is Simon's friend. Meanwhile, a disheveled, Rabbi Glass (Richard Lewis) stops by to confide in Eric that he caught his wife (Loraine Newman) kissing another man and discusses about splitting up. Kevin feels emasculated after being attacked and injured by a woman during a domestic disturbance call and goes on medical leave. His attitude toward Lucy changes drastically as he worries that Lucy isn't attracted to him anymore. Plus, Simon is concerned that no one seems to care that he's leaving for college in a couple of days. Lastly, Ruthie and Peter struggle with a school project.

The governing body of the Commonwealth has voted "no-confidence" in triumvir Tri-Jema, she sends Dylan to get the Andromeda refitted and visit an augur, who is told to be infallible. This augur, dubbed Citizen Eight, aims to take Tri-Jema's place as triumvir and, according to the triumvir, remove Dylan from command of the Andromeda. The robots sent to the Andromeda to start pre-upgrade repairs turn against the crew, forcing Dylan and Harper to shut them down. Dylan must deal with Citizen Eight before he can bring down the Commonwealth from within.

This two-part Las Vegas episode featured six contestants competing in six stunts. The winner would have to bet half their winnings on a hand of blackjack.

Andy's well-intentioned plan to give Ephram more free time by hiring college student Madison Kellner (guest star Sarah Lancaster) as a caretaker for Delia ends up making things worse when Madison treats Ephram like a child, as well and embarrasses him in front of Amy. Meanwhile, Andy's concern for Colin's alcoholic father (guest star Michael Flynn) blinds him to Nina's struggles with her divorce proceedings. Dr. Abbot continues to clash with his sister, Dr. Linda Abbott, when she tries to take over his office and the difference in their personalities and medical philosophies becomes alarmingly clear.

Alan fears he is losing his son and goes drinking with Charlie.

Horatio hunts for the person responsible for a vicious attack on a woman who was lured to a vacant condo and beaten with a piece of lumber.

During Ferrari weekend, Danny and Ed get suspicious when a high roller cashes in forty grand but doesn't gamble a single dollar. They suspect him of money laundering. Danny must find out what he is up to, while handling the fact that Delinda has dumped him. Ed's goofy cousin Donny shows up at the casino and is getting married to the girl of his dreams that he just met at the roulette wheel. He asks Ed to be his best man.

Guest: Michael Moore (Author, Dude Where's My Country?)

Segments: Re-Decision 2003

WMD Report and Reactions

Ed Helms (Human Shields)

Back in Black (Segways Being Recalled, Hillary Recalls Her Book in China)

As DI Jane Archer investigates the recent deaths on Keller, Ric gambles away a small fortune to try and repair his relationship with his daughter. A patient is brought in who needs a gall-bladder operation desperately which has to be done at the Hadlington but her husband hasn't told her that they can't afford it.