Mrs. Princey (Kathryn Givney; 1896-1978) is a villainess from Alfred Hitchcock Presents' second season opener, "Wet Saturday" (airdate September 30, 1956). She is the matriarch of the prestigious Princey family.
As revealed in the opening episode, Millicent Princey was in a romantic relationship with her schoolmaster, but after learning that he had plans to marry another woman, Millie killed her lover in a fit of rage. Rather than show shock over her psychotic daughter's actions, Mrs. Princey only expressed horror that such a thing could happen to them as a family, showing her callous elitism.
At that moment, Mrs. Princey went along with her husband's plan to cover up Millie's murderous act by setting up an innocent person to take the fall, with police captain Smollett as their planned patsy. She expressed pride at their plan seemingly being successful at episode's end, but as revealed in Hitchcock's narration, the evil Mrs. Princey ended up arrested (along with the rest of the family) for the cover-up, as Smollett refused to falsely confess to the murder.