This was Basil Ruysdael's next-to-last credited acting role. Eleven months after this show first aired, he would die of complications following surgery. He was 82.
This was the first episode of the show that didn't have "The case of THE..." in the title. There would be two more.
Some prints from this season still show the sponsor's advertised products in the closing credits. Some prints of this episode show images of "Colgate Dental Cream with Gardol," "Wildroot Cream Oil Hair Tonic," and Halo Shampoo.
Perry also defends one of his team in the TV movie Perry Mason Returns (1985), where Perry resigns as a judge so he can defend Della against a murder charge. It's the first in the Perry Mason TV movie series.
Though he is not named and is credited as "Ballistics Expert", Norman Leavitt plays a role substantially like that of Mr. Redfield, the ballistics expert who appeared in two first-season episodes.