In this season, Anita Gillette joins the cast as Dr. Emily Hanover, and the opening theme is again rearranged to sound more electronic.
After an elderly woman is killed by a punk trying to rob her, Quincy goes to the crime scene to investigate and is himself attacked and mugged by the same punk, which results in Quincy becoming fearful of any noise or darkness, and Emily has to help her husband overcome his fears and find the killer responsible.
An elderly woman (in the advanced stages of Alzheimer's disease) is shot to death by a burglar in her home.
The woman's sister, along with another man, Morris Perlmutter (Keenan Wynn), were vaudeville stars that Quincy saw in his younger days, but Morris feels his advancing age and resulting forgetfulness will prevent him from making a comeback on television, and turns to Emily and Quincy for help.
The man and his severed arm are taken to an experimental treatment center, Experiment Hope, where the doctor-in-charge (Barry Newman) utilizes revolutionary medical techniques to re-attach the severed limb and help the man return to a normal life with full use of his arm.