What That Line on ‘Perry Mason’ About Mr. Holmes Retiring Means

(Some very light spoilers ahead for the July 12 episode of “Perry Mason” on HBO) “Perry Mason” is a very serious show, but that doesn’t mean it can’t drop the occasional pop culture reference. That’s part of the theoretical charm of period movies and shows — references to other things that were going on in whatever time the story is set. And in this weeks episode we got an offhand reference to a movie that was about to be released in theaters….