Diagnosis

Police detective Steve Sloan believes that top manager Nick Osborn has killed his boss, trust-owner Russell Cord. His father, senior hospital doctor Mark Sloan, is convinced that his long-time patient Osborn is innocent and soon discovers three other top employees of the Cord Group who also had reasons for killing their boss.

Dr Mark Sloan cannot believe that his former student Dr Drummond, an ambitious cosmetic surgeon, has committed suicide. Assisted by his team of hobby detectives, pathologist Amanda Bentley and junior doctor Jack Parker, Sloan tries to investigate the case.

Dr Sloan suspects that his flame of long ago, famous heart surgeon Dr Rachel Walters, has murdered US Senator Cabot on the occasion of a guest operation at the community hospital.

The once-athletic Angel, 23, suffers from episodes of muscle pain so severe she often can't move. As she begins a nursing career, she needs answers.

The parents of bright and charming, Sadie, 7, seek alternatives to the devastating brain procedure doctors propose to treat her frequent seizures.

Day by day, Willie, 46, loses pieces of himself. He has memory loss, seizures, mood sings, a brain lesion -- but no diagnosis. Can the crowd help?

Dr. Sloan is under suspicion after his tax preparer is killed with Mark spotted 'hovering' over the body.

Suspicion is cast on Norman Briggs after the chairman of a philanthropical medical group of which Norman is a part, is murdered. Steve and Mark attend the funeral to nail the culprit, who promptly falls over dead.

Two women involved in a love triangle plot to murder a man, take his millions, and leave the country. Dr. Sloan investigates after his friend's mysterious disappearence.

Ashley York murders her wealthy father and cleverly manipulates it to appear as though he killed himself. Dr. Sloan picks away at holes in the story, which leads him directly to Ashley.

Dr. Sloan takes in an abandoned young girl found at the scene of a murder, while Steve and Jesse go about tracking down the killer.

The murder of a beautiful woman around a marine encampment raises suspicions. Dr. Sloan discovers more to her than meets the eye.

One police officer is accidentally shot by another during a raid gone wrong. Dr. Sloan investigates the victim's wife, the shooter, and a conniving lawyer when he suspects foul play.

A burglar inadvertently becomes infected with a deadly virus. Dr. Sloan and Jesse are subsequently exposed to the virus after Jesse stumbles upon the thief's dead body. Both Mark and Jesse are confined to Mark's home while Steve and Amanda investigate the drug company that manufactured the virus, in the hopes of discovering an antidote before Jesse runs out of time.

A figure skater hires her ex-coach to attack a rival skater. Dr. Sloan tries to prove her guilt.

Steve becomes embroiled in political intrigue after the murder of a city councilman's wife appears to be part of a larger political strategy. Steve investigates two mayoral candidates, the councilman and the chief of police, as well as a rogue detective and his partner, all with strong motives.

Mark investigates when a teenage girl is murdered after threatening to reveal her affair with her older lover, a newly appointed state Supreme Court Justice.

A Malibu Hills fire is the backdrop for rising tensions between the residents; a disgraced stockbroker, a naturalist, a worried father, and a land developer. A worried Dr. Sloan deals with his own parental fears when Steve helps fight the fire.

Mark, Steve, Jesse, and Amanda are all trapped in the rubble of Community General in the aftermath of the bombing. Mark tries to shake off the numbing effects of the explosion in time to save Amanda, who's suffering from a punctured lung and broken collarbone. After the dust settles, the hunt for Caitlin Sweeney begins. It's discovered that the Sweeneys belong to a terrorist organization, R.O.A.R.

Carter and Caitlin kidnap Mark, forcing him to mastermind a 100 million-dollar theft. On the outside, Steve and Ron collaborate to find Mark. Meanwhile, Jesse and the Sloans buy a barbecue joint.

Two fiancées plot to murder the bride's father on their wedding day. The two review their perfect plan the night before the wedding. Unfortunately murder is never as easy as one might plan.

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.

Mark's office decorator is murdered.

Young woman is in a car accident and goes blind, Mark must figure out who committed the murder.

A body found on the beach turns out to be Jim, the hospital janitor, but when his twin brother Jeff shows up to identify the body, Mark and Steve become suspicious.