For me, there is a real plot hole here, because none of the events that unfold in this episode would have happened if Mrs. Eastman had simply divorced her husband. Her reasons (not wanting to sully his name) despite his philandering, just don’t hold water, especially if he has cut her off financially to boot! Submitted by gracep, 12/2/2010.
+ I thought that Kate and Walter were portrayed as a couple who deeply loved each other, with each character mystified as to why they were heading toward a divorce they truly didn't want. The anomaly nagged at me until . . . ALL WAS EXPLAINED in the last courtroom scene and the summing-up in Perry's office! I can't say any more without committing a "SPOILER"! Gracep, I think that you might have missed the last two scenes of the episode! Added by GaryW, 10/2/11.

That hairpin turn where Kate Eastman stops the Mooneys has been the scene of several dramatic Perry encounters. DOD 11/17/20

The Maserati 250F was a champion Formula 1 car of the mid-1950s. ID Clue #1 is the Trident motif in the (nose) radiator air intake, visible in photo at top of this page (adjust monitor brite/contrast if not seen). Other I.D. features are the (1) long sleeve-like "scoop" carburettor air intake on the Right exterior of the engine compartment, (2) wrap-around plexiglass windshield and (3) general body shape. "No less than 34" 250Fs were built 1954-58 both for private sale and for the Maserati Works F1 team. 250Fs had 40 wins during that period including many major F1 victories up to end '57, at which time it was eclipsed by its competition. Its classic beauty has always been appreciated and Stirling Moss said "It really was a very nice car to drive." This car in Episode #133 is probably an early 250F since only the initial production sported the front Trident badge and later cars had a sleeker, longer nose. The 250F has long external exhaust pipes on the Left Side, from the engine compartment back to the tail. These are not visible in the opening scene but are in the following track scenes, which may be absent from today's cable episodes.
      Of course, the car here has a (notional) "Rotary Engine" only for the story-line; if anyone actually were to open the hood on this episode's race-car, we would see a "conventional" 6-cylinder reciprocating-piston engine. Read more about the 250F at the Wikipedia and see some photos at Historic Racecars. See the badge here. Added by Gary Woloski, 9/22/11.
+ For the Crash Scene, the CBS/Paramount DVD contains, at 2:56, a one-second-long close shot of a Maserati 250F making a relatively benign, abrupt sideways roll and slide down a 2-meter (6 foot) embankment. The car in this very short shot has a large racing number "4" painted on the rear section, so it's not the same un-numbered Maserati 250F shown earlier with the Cast actors. Added by Gary Woloski, 3/15/12, revised 2/3/13.

As the owner of two rotary-engine-powered cars over the years (a 1982 Mazda RX-7 and a 1993 Mazda twin-turbo RX-7, which I still own and drive), I couldn't believe my ears when I heard Walter Eastman tell Perry about the rotary engine in the race car ("no valves, no pistons, no cams..."). This episode was made only four years after the first prototype rotary ("Wankel") engine was built in Germany, and three years before the first production rotary-powered car was offered for sale! Someone on the Perry Mason production staff must have been a car or racing buff; I would think very few people would have heard of the rotary engine in 1961. Sadly, due to high emissions, poor gas mileage, and reliability problems (I'm on my third engine in my '93 RX-7), the rotary engine has never fulfilled its promise. Submitted by 65tosspowertrap, 10/10/2013.

"Piston engine goes boing, boing, boing, but a Mazda goes hmmmmmm." I've had that advert phrase stuck in my brain for decades.

'65tosspowertrap's' comment couldn't be more pertinent - I just read that Mazda has once again put off reintroducing a rotary powered car. Their most recent model with their 'Renesis' engine was dropped a year or so ago. The Ro80, one of the first rotary cars, didn't do all that well, finally being dropped and the company being bought by Audi. Oddly, in Chicago, where I live, there was a service station on the near South Side (down the street from Home Run Inn pizza, if you know what I'm talking about) that had a Ro80 on it's lot for several years - station and car are long gone now! Submitted by MikeReese, 12/6/2013.

Is it my imagination or do actors Jess Barker, who plays Walter Eastman in this episode, and Hugh Marlowe, who appears in numerous other Mason episodes, have incredibly similar voices? Submitted by BobH, 14 January 2016.

Funny, I thought he sounded a lot like another PM stalwart, George McReady. All in all, we didn't care for this episode. Both the motive and that bit with the tires struck us as ludicrous. DODay 10/10/17

TCOT Silent Secretary might have been a good title for this episode (see top trivia), but then almost anything would have been a better one: amongst the forest of meaningless titles, this stands out as a towering tree of badness, since there is one person in the episode who has been clearly injured, and he is anything but innocent. (Was a more subtle meaning - perhaps psychological rather than physical injury - intended?? Perhaps, but it gets rubbed out by the head scratching.) Notcom 041522

Spoiler Warning! Do Not Read Below If You Have Not Seen The Episode

One of the more unusual courtroom confession scenes, with an ample slice of ham, as the guilty party changes abruptly from a seemingly benign figure into a grinning psychotic manipulator obsessed with his own cleverness. Submitted by BobH, 28 December 2015.
+For his performance in this critical scene, the actor becomes eligible for the 1961-62 season's Robert H. Harris Award. Unfortunately, Mr. Harris himself couldn't give him a run for his money, not having made even one guest appearance during the entire season. Submitted by BobH, 21 January 2017.

Kirby Evans' Wheel-Switch between different model XKs is technically possible. In the real world however, knock-off wheels give little or no practical advantage to the home mechanic over switching conventional wheels; it's really just a plot gimmick here. But Kirby was Kr@Zy, so that is irrelevant. Note:

  • Both cars must still be jacked up.
  • The knock-off spinners, which are screwed on very tightly, must be whacked off with a one-kilogram (2.2 lb) copper-headed hammer. . . and whacked back on after the switch. Noisy! You'll get the idea here watching the chap checking that his knock-off spinners are tight enough.
  • Nevertheless, this is a great plot device because many viewers would have associated knock-offs with quick wheel changes (note the lifting dolly). The knock-offs on Cars 2, 3 & 4 give a visible clue for the TV-Dinner sleuths.

Kirby's XK140-XK150 wheel-switch is technically feasible (as confirmed by this episode's crew, who did the whitewall/blackwall switch between cars before filming!):

  • XK120, 140 and 150 all had the same wheel and tyre size (6.00x16).
  • Today, new replacement wire-wheels for XK120, 140 and 150 are identical (Part no 202162 & others).
  • Whether or not Kirby's switch between models was a "Not Recommended" practice in 1961 is a question for an XK historian (XK120 & 140 had drum brakes but the heavier XK150 had quicker-stopping disc brakes). But Kirby was a crazy psychopath, so that doesn't matter either.
  • For curious mechanics, the hubs for XK120 & 140 (both with drum brakes) are identical and shown here. The XK150 hub (disc brakes) is here. Note the splines on the stub shafts which must match the splines on the inside of the wheels. The spinner screws onto the outboard threaded segment of the hub and the whole assembly rotates with the spoked road-wheel and brake drum or brake disc to which the hub is bolted.

The appearance of conspicuous wire wheels on three cars in the episode was a deliberate plot gimmick that was intended to provide a clue. The complete version on DVD gives us the opportunity to spot the clue whereas today's cable-network versions with Kirby's car edited-out don't - It's Criminal! Submitted by Gary Woloski 3/14/12, revised 2/4/13.