Diagnosis: Murder — Season 7

A comedy roast in Mark's honor is ruined by a double murder.

Mark worries that his sleepwalking brother may be guilty of murder.

Mark baby-sits Barbie, the daughter of one of Steve's old friends, while her father hides from a gangster.

A fiendish med student sells prescription pads to a drug dealer and murders his partner when she becomes too needy. Mark plays Columbo to nail the murderer.

Steve investigates a murder in which the main suspect is the husband of Mark's old flame. Steve and Jesse date the same girl.

A med student, surrogate daughter to Madison Wesley, is sent to a rehab program to kick drugs. Once there, she's wrongly accused of murdering a fellow patient. Mark sets his sights on bringing down the real culprit.

Mark's life becomes hectic when a look-alike gangster moves to LA and is caught up in a struggle for power.

Susan Gibney [ Maya ], David Marciano [ Eddie Michaels ], Michelle Stafford [ Trish ], Robert Bailey Jr. [ CJ ], Rusty Burns [ Betsy ], Richard Cody [ Kip ], George W. Hartmann [ Tommy ], William Newman [ Chester Chumley ], Kathleen Lloyd [ Emma Bornstein ], Kevin McNally [ Paramedic ], Aaron J. Meeks [ Dion ], John W. Johnston [ Rick ], Patricia Place [ Mrs. Palmer ], Daniel Zacapa [ Waiter ], Channon Roe [ Lucas (uncredited) ] rc: Med Student Alex Mark's life becomes hectic when a look-alike gangster moves to LA and is caught up in a struggle for power.

An outgoing radio host who's hunting for her birth mother is suspected of murdering a phony mother. Jesse's mother visits.

Mark matches wits with a beautiful jewel thief who's being framed for murder.

Hospital horticulturist Claude is revealed to be an escaped convict living under an assumed name for the past 10 years. Mark fights to shelter Claude from extradition while striving to prove his innocence.

Mark takes on a temporary assignment as physician on a cruise ship and sleuths to uncover the killer of a disagreeable man.

The whole gang, plus Alex Smith and Amanda's rascals, are invited to observe the shooting of an episode of "Frontier Dad", a family series about Wild West hero Dash, starring Carl Simpson.

Mark investigates when a philandering chef is murdered during a televised charity cook-off.

Mark is stunned to learn that his late friend Jake was married to two women. Steve juggles the investigation of Jake's murder and a blossoming relationship.

A devious home security programmer plots to murder the children of everyone involved in the accidental death of his son.

A young med student is suspected of killing her abusive husband after her story of murderous burglars proves false.

Steve meets a new girlfriend on a television game show and then investigates when she's killed. Steve suspects her estranged brother, a doctor at Community General.

Doc Sloan goes undercover as a patient in a retirement home to solve the murder of an ex-cop.

Steve teams with a Naval Investigator when the apparent suicide of a military officer turns into a cold-blooded murder.

Mark appears on a quiz show to uncover the killer of a game show contestant.

Mark's old friend, singer Danielle Marsh, visits and begins exhibiting erratic behavior while dodging attempts on her life. Mark attempts to fight through Marsh's defensive barriers to help his friend.

An old friend of med student Alex Martin is mixed up in the murder investigation of an L.A. 'madam'. Mark suspects Alex's friend may be more deeply involved in the madam's business than she lets on. Meanwhile, Madison Wesley is stalked by a homicidal killer who's recently undergone plastic surgery.

Madison moves in with her new paramour, unaware that he's trying to kill her. Jesse is suspected of being the anonymous author of a tell-all book that places hospital workers in spicy relationships.