Raymond Burr and Wendell Corey appeared together in Rear Window (1954), with Burr playing the murder suspect and Corey playing a Detective.
The license plate (EJD 390) on "Jason Rohan's" Lincoln Continental convertible has been seen on two different cars in two previous episodes. It was seen on a dark Lincoln Continental in "Bogus Buccaneers" (S9 / E15) and on a red 1966 Ford Mustang in "Twice-Told Twist" (S9 / E21).
Because of "stock footage" used, Perry actually has two cars in this one episode. His "first" car is a 1965 Lincoln Continental convertible. And, in front of the courthouse, Perry's "second" car is a 1962 Ford Galaxie 500 XL convertible. Later, Perry reverts back to his "first" car when he and Della go to their office building ("The Bank of California Building") which is believed to be "re-used" footage from a previous episode.
This was Gloria Talbott's final television role. She would make one more film appearance before retiring from acting.