
Dr. Mark Sloan is chief of Internal Medicine at Community General Hospital -- and sometime consultant to the local police department. When he's drawn into a case, he combines sleuthing and medicine to solve the crime. That crime is usually one his detective son, Steve, is working on as a member of the local police department. Dr. Sloan's medical colleagues, including doctors Amanda Bentley, Jack Stewart and Jesse Travis, are also frequently drawn into his investigations.
Mark's (Dick Van Dyke) old flame (guest star Michelle Phillips) begs him to help clear her husband (guest star Ray Wise) on charges of murdering one of her many lovers. Joanna Cassidy also guest stars.
Mark tries to clear the name of a drug addict who is suspected of killing another addict with an overdose at a rehabilitation center.
Mark helps a radio host accused of murdering the woman who gave her up for adoption; Jesse is visited by his overbearing mother.
Mark takes on the extortionists responsible for murdering the twin sister of a young woman who claims Dr. Travis fathered her infant son.