Of All Sad Words begins with a suspicious nightclub fire and the owner being found dead inside. Quincy (Jack Klugman) conducts the autopsy and determines that the victim died of cardiac arrest before or during the fire, but further questions arise as to whether it was brought on by a fatal dose of his heart medication being administered. The wife of the victim, Elizabeth Chessler (Darleen Carr), is a suspect and being pursued by a persistent insurance investigator (Val Avery) who believes she is a black widow and this wasn't her first first homicide, but Quincy becomes involved with her and goes to great lengths to protect his new girlfriend while potentially placing himself in danger if the accusations are true.
This is a pretty good murder mystery episode and I appreciated this aspect, but the problem with it was Quincy starts acting completely out of character. Yes, we are used to him hitting on and dating people that he meets through his profession, but to become immediately involved with the prime suspect in a murder before all the facts are in was just crazy and he certainly wasn't thinking with his brain! I especially did not like the scene where Quincy first meets Aaron Zacharian as the insurance investigator and accuses him of harassing a "grieving widow" after she already told him that it was a loveless marriage and she was glad that her husband was dead. Misrepresenting the facts much to protect your girlfriend??
If you can get past Quincy's unprofessional and foolish behavior, this is an entertaining and enjoyable Season 6 episode which does feature a compelling criminal investigation. I also really liked the Aaron Zacharian character with Val Avery in the guest role and kind of wished he had become a recurring character in the series to intervene in episodes like this where Quincy is rendered temporarily stupid due to his hormones.