McMillan & Wife - Season 5 (1975)

During a period of fiscal austerity for the city, Enright takes a lucrative position in a private detective agency in which a person blackmailing politicians might operate.

After being shot while on a stakeout, Mac witnesses a murder in the hospital while partially under sedation while awaiting surgery. Everyone thinks Mac's story is a hallucination, but he's convinced one of the doctors murdered a patient.

In an episode which introduces Mildred's sister Agatha to the cast (Nancy Walker had already committed to her own series for the following season, and Agatha was to become the new housekeeper), the McMillans, Mildred and Agatha go to visit a woman relative of Mildred and Agatha, a very wealthy woman who's dying -- but not quickly enough to suit one of her nephews, who's in debt to a loansharking company later described as "just this side of Murder, Incorporated." Threatened with death if he doesn't come up with the money right away, the nephew smothers the old lady in...

Mac goes onto temporary duty as a Navy JAG and is immediately given a case defending a Navy officer accused of murder. Mac soon discovers the victim isn't who he was supposed to be and his client isn't telling the whole truth.