Diagnosis: Murder - Season 6

After Amanda wins an elite Medical Examiner's award, she, Mark, and Jesse have to investigate who deliberately let loose a deadly disease inside the upscale hotel where the award ceremony was going to take place.

Following the deaths of several patients and an unpopular doctor at Community General Hospital, Steve, Mark, and his colleagues work on trying to discover what connects all the deaths. When the doctors soon discover the connection to all the deaths – each victim previously survived a near death experience – they have to find out who the killer is before they carry out their next murder, and they have their sights set on Steve.

When a young man with a chip on his shoulder named Tommy gets in a scuffle at BBQ Bob's, Steve arranges it so Tommy complete his community service at a local boxing club for at-risk youth. When a fellow boxer takes his own life in front of Tommy, he turns to Steve and the owner of the boxing club for help in discovering why the boxer was behaving so erratically when he died.

Steve and Mark work to aid two women detectives on the LAPD who are investigating a group of crooked cops who are targeting unethical businessmen in order to donate their organs to those in need.