A gangland 'protector' under surveillance by Steve becomes infected with the plague when a medicine bottle is mysteriously switched. Dr. Sloan tries to find the source of the virus before the murderer starts an epidemic.

Jack and Steve vie for a young woman's affections as she leads them in an investigation of a PI's death.

Dr. Sloan investigates the murder of an antagonistic pro volleyball player. Steve searches for an alleged stalker while Amanda and Jack keep an eye on her teammates, none of whom are particularly upset over her death.

Dr. Sloan tries to solve a friend's murder while Steve investigates the deceased's ex-wife and her identical twin sister.