Continuity mistake: Ann Clyde and Hugh Lombard are drinking milking in the kitchen. During the whole scene Shirley Eaton's golden hair is behind or in front of her shoulders, it keeps switching. (00:28:30)
Revealing mistake: As the cable car dangles and the 'heroes' are struggling to find a solution, Mario Adorf operates a control panel that wobbles like cardboard from the slightest touches. (00:29:50)
Revealing mistake: The cable car that plummets to its destruction is missing the number "1" printed on the outside. (00:30:20)
Continuity mistake: General Mandrake confesses his crime. Ilona Bergen asks "How does this help?" Lombard is standing straight and tall, but in the previous shot he was leaning at an angle against the wall and the drawer. (00:32:40)
Continuity mistake: After the General takes a weight off his conscience admitting to his guilt, his handkerchief feels lifted too and sticks out of his pocket more than before. (00:32:45)
Continuity mistake: After the General is murdered, everyone is back in the dining room in front of the statuettes. The Judge mentions that the twisted Owen believes he's doing "justice." Notice the handkerchief in the pocket of the Doctor. It sticks out a lot. Blore says "I'll tell you one thing", and the pochette is now tucked in with just the tip poking out, and it comes out again in full in the next shot. (00:37:50)
Continuity mistake: When the Judge says "Mr. Owen is one of us", cue dramatic music. Miss Clyde takes her hand off the top of the chair, but she's gripping it like earlier in the next shot. (00:38:15)
Continuity mistake: Miss Bergman interrupts the game of snooker after the doctor has just taken a rather lame shot. Eyes on the ball he shot; when the Judge begins his demonstration, that ball, next to the 8 ball, it's at greater distance from it than before. (00:40:20)
Continuity mistake: Blore chimes in during the Judge's explanation of the mind games saying "One is bogus." Notice the shadow the Judge casts on the wall. When Blore turns towards the doctor to ask about his alibi, the judge has changed spot casting a different silhouette on the wall. (00:41:20)
Continuity mistake: During the second dinner, the doctor asks for more wine and Grohmann pours it. The Judge's pocket square sticks out a lot, but just a tad in the close-up that follows, as he looks at the leaving Grohmann. (00:44:05)
Continuity mistake: Lombard and the butler are fighting. The Judge asks "Stop it! Stop it you two." In this close-up there are plenty differences in the small crowd at the door; for instance the doctor's hand is at a much higher point of the doorframe, and the actress had her hand on the judge's shoulder and now she's biting a nail. (00:45:40)
Revealing mistake: When Lombard sends Herr Grohmann crashing into the suit of armor, the stuntman for Mario Adorf can be seen in the face. (00:46:35)
Continuity mistake: Herr Grohmann decides to leave. He shuts the main door behind him, puts his hat on and walks away. His rope is on the left shoulder, and goes straight down his side. When he's shown with the camera behind him, the rope is worn across the torso. He then reaches the Devil's Leap, he's wearing the rope again along his side, and only then he puts it crossbody. (00:49:00)
Revealing mistake: The overhead shot of Grohman climbing down the mountain features an alpine stuntman wearing gloves, while at no point Mario Adorf was shown wearing any. (00:50:20)
Revealing mistake: The dummy taking the fall for Mario Adorf truly falls like a ragdoll, with the legs obviously crossing together in the most unnatural way. (00:50:40)
Continuity mistake: Blore accuses Miss Bergen who replies "I was on the terrace, for five minutes." Lombard piles on her misery with a comment that shows his shadow and Miss Clyde's in a completely different position and angle. (00:52:25)
Continuity mistake: When Miss Clyde, Blore and Lombard enter Ilona Bergen's room, the Judge's handkerchief sticks just with the tip from his pocket, but sticks much more in the next of the scene before he removes it. (00:56:00)
Continuity mistake: When the doctor points at the arm of Ilona Bergen saying "Here's your bumblebee", it's in a straight line from the shoulder in close-up, but she is lying in bed with her arms pointing down. (00:56:00)
Continuity mistake: Blore is going in search of the generator, and the doctor approaches the light switch of the billiard room. In close-up the section of wall with the switch is nicely lit, but it is in the shadows in the camera angle encompassing the whole room. (00:58:20)
Continuity mistake: During the various segments when the doctor and the judge are on their own while the others 'fix' (aka, break for good) the generator, a few times again the handkerchief in Cannon's pocket sticks out more - way more - in some shots, for instance when the doctor asks him to stop the game of cat and mouse. (00:59:40)
