
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.

Dr. Sloan must baby-sit a 14-year-old girl when Steve's old Army buddy becomes involved with underworld figures.

Dr. Sloan tries to clear his colleague's (Joanna Cassidy) name after she is arrested for selling narcotics.

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.