TRIVIA: The car Greg Halliday is driving is the same car that belongs to Jeff Randall throughout the series Randall and Hopkirk (Deceased).
NITPICK: In the final scene, the palm of Halliday's left hand, which was shown as severely burned, is seen as perfectly healthy. A second or third-degree burn would not have totally healed within the 8-10 day timeframe the episode is set in, nor would it have healed without scars.
NITPICK: The close-up of Stewart's watch shows the date as the 10th. The opening sequence says the "case" began on April 20th. Halliday was in his boarding room for a week, which would have put the date as the 27th when he was abducted. The date on Stewart's watch, therefore, should have been between the 28th and the 30th.
GOOF: When Sir Curtis is getting a haircut, the barber's shears are obviously nowhere near his hair.
GOOF: Stewart is seen in two scenes smoking, but in the episode "Who Plays the Dummy" he says he doesn't smoke.
GOOF: The backdrop in the scene where Annabelle is being followed is obviously fake (worse than normal).
GOOF: The dead man's name is Jimmy, but in the garage, after Jason beats up her captors, Leila (his sister) calls him Johnny.
TRIVIA: The red Mini Cooper used at the beginning of the episode (where the young lovers are parked when they find the dying man in the spacesuit) is the same automobile that belonged to Marty Hopkirk throughout the Randall and Hopkirk (Deceased) series.
GOOF: The Mark Caine novel called People in Glass Houses Shouldn't elsewhere in the series is called People in Glass Houses Should Not in this episode.
GOOF: When Stewart receives Jason's phone call, the phone stops ringing before Stewart picks the phone up.
GOOF: In the scene where the drugged Jason falls into the water, it is very obvious that the stunt double (who has much shorter hair) is in the scene.
GOOF: The scene where Stewart and Sir Curtis are jogging together is obviously a projection screen back drop.
GOOF: In the opening scene, the pilots have uniform jackets on; but when the shot shows out the cockpit window from over their shoulders, they do not have their uniform jackets on.
GOOF: At the end of the show, when Jason is on the runway, a plane is shown taking off immediately after pulling back from the loading gate. No commercial airplane could take off without taxiing down the runway.
NITPICK: In the opening, when the man is taking the photographs, he is hitting the button so hard that he is jarring the camera, which would've resulted in very blurred photos.
GOOF: The shadows of the microphones picking up actors' dialogue are clearly visible on the wall in the second hotel room scene.
Goof: Suddenly there's an additional signature field in the ID that Stewart shows to the guard at the power plant (which wasn't there a few episodes before in The Pied Piper of Hambledown).
NITPICK: Why is the money taken from a Paris bank robbery in American money?
GOOF: When Jason is staking out Weber's building, a distant shot shows him sitting in the passenger seat, but the close-up shot shows him behind the wheel. It's also obvious that the distant shot is not Peter Wyngarde.
GOOF: In the close-ups of Jason skiing he does not have a skiing cap on, yet when he falls and in the distance shots he does have a skiing cap on.