Some sample questions from this category:
* For which character in the series did Raymond Burr originally audition?
* What was the name of the character played by William Hopper?
* What was the name of the actor who played the ever unsuccessful District Attorney Hamilton Burger?
* What is the first name of Lieutenant Tragg, the chief police detective in the series?
* You will remember that Barbara Hale played Della Street, Perry Mason's trusty secretary, but what was the name of the outer office receptionist who featured in many episodes?