Double Sin - S2-E6
Continuity mistake: Madame Durrant is showing the niece the medallions she is supposed to sell. In close-up you can see her holding the suspension ring with her right hand, and her left hand too, on the side, with the thumb on it. But in the wider shot, she is using merely the side and back of the left hand for support, the thumb being at distance from the jewel. (00:08:20)
Double Sin - S2-E6
Continuity mistake: Poirot has just been 'beastly' with Japp, in Hastings' words. In the establishing shot of the town square before the bus, a woman in orange (Miss Durant as we'll learn) pass by the ice cream cart. That same woman passes again the same spot as the camera is behind the cart, following the policeman and then getting Poirot and Hastings in frame. The driver and the man he was talking to are also in a different spot as that happens. (00:11:10)
Double Sin - S2-E6
Continuity mistake: In the car chase, when the woman turns to check the police behind them, the close-up on the steering wheel does not match the position of her hands before and after. Similarly her passenger has the right hand visible when it shouldn't be. (00:28:45)
Double Sin - S2-E6
Continuity mistake: When Hastings storms out of the antique store claiming to have solved the case, Poirot follows him until he turns into an alley. In the view from the back of the alley, there's a man with a hat who walks all the way past Poirot and turns the corner into the main road. In the reverse angle, the guy is still walking down the alley in front of Poirot. (00:42:30)
Double Sin - S2-E6
Continuity mistake: At the end of the episode, Hastings flips the cutting, having the left palm on the back of it. Next shot, and he's holding it by a corner. (00:50:45)
The Adventure of the Cheap Flat - S2-E7
Continuity mistake: Hastings, Japp (for some reason) and Poirot are at the movies; when the camera pans through the room, there's a guy sitting behind Hastings, while behind Poirot there are a red haired woman and a man, as confirmed by the close-ups. When the music stops and Hastings tells Poirot that he can open his eyes, the couple have moved behind Hastings. (00:02:50)
The Adventure of the Cheap Flat - S2-E7
Continuity mistake: During the party, the establishing shot shows everyone in the small circle Poirot is a part of having a glass of champagne. That includes Mr. Robinson. As Poirot puts on the tray his own glass, someone's hand reaches over for another - it can only be Mr. Robinson's, as his wife is wearing gloves, but he never put down his own glass. (00:06:05)
The Adventure of the Cheap Flat - S2-E7
Continuity mistake: In the first scene with the 'G-Man', the room in the shots with the camera roughly by his shoulder is lit in a different way, with his body fully in the 'sun'. Especially visible when he picks up the phone and starts spouting yankee-isms going all "Yeah yeah so what yeah." (00:09:00)
The Adventure of the Cheap Flat - S2-E7
Continuity mistake: Poirot knocks at the door of The Black Cat, next to a street worker and a pimp. Nobody is walking down the street in the wider shot, but in the close-up an elderly couple passes by. (00:22:55)
The Adventure of the Cheap Flat - S2-E7
Continuity mistake: Poirot is doing his round of phone calls at night clubs looking for the chanteuse; the pen before Hastings' arrival is pointed to the left side of the screen, when he sits down (and Poirot has not touched it) it points to the right. (00:24:40)
The Adventure of the Cheap Flat - S2-E7
Continuity mistake: Miss Lemon, as Penelope Maitland, enters the performer's room. The shady character that opens the door does it holding a cigarette in his left hand. The hand is kept close to his chest in one shot, while it's on the door in the reverse. (00:31:35)
The Kidnapped Prime Minister - S2-E8
Continuity mistake: When Poirot tells his tailor that it's his equipment that is at fault, Hastings holds the newspaper in ways not coherent between shots (he folds it, but in the reverse shot is still looking at the top of the page, and so on). (00:04:20)
The Kidnapped Prime Minister - S2-E8
Continuity mistake: Poirot opens the car window in two shots; in the first he is holding his walking stick close to the body, but in the second he has a completely different posture, with the cane perfectly vertical and his arm at a right angle. (00:13:20)
The Kidnapped Prime Minister - S2-E8
Continuity mistake: At Scotland Yard, Poirot is readying the glasses for the moment when Japp will pass him the paper he's reading, about the driver. When the view switches, his hands, that were above the desk level, start off from underneath the desk. (00:33:35)
The Kidnapped Prime Minister - S2-E8
Continuity mistake: Hastings has lost sight of the car he was pursuing, and stops at the crossroads. In the wide shot you can see his left hand holding the top of the windshield, but in the close-up he's using just his right hand. (00:40:40)
The Adventure of the Western Star - S2-E9
Continuity mistake: In his preparations for the arrival of his idol, Poirot sets a bunch of flowers with a card ("Mlle. Marie Marvelle"). When we see the bunch later as Poirot has to leave to go to her, the card is absent - but he has not touched the table. (00:03:55 - 00:05:15)
The Adventure of the Western Star - S2-E9
Continuity mistake: Mademoiselle Marvelle outstretches her arm to hand Poirot the menacing message; her hand does not move in the following shot, but when we get back to a full view of Rosalind Bennett, she is holding the card with her arm bent. (00:07:05)
The Adventure of the Western Star - S2-E9
Continuity mistake: When Lord Yardly is offering wine to Poirot, in the aerial shot Hastings has both hands over the glass, but his hands are in a different position in the consecutive view. (00:20:20)
The Adventure of the Western Star - S2-E9
Continuity mistake: Japp shows his documents to the two policemen who caught him lurking in the bushes; when he says "Twigez-vous?" he's holding the card by the corner, while in the reverse shot ("Oh, very sorry, Sir") he's holding it in the middle. (00:25:30)
The Adventure of the Western Star - S2-E9
Continuity mistake: When Poirot enters the room of Mademoiselle Marvelle after her husband took off for the airport, she opens the door to him holding the door in two contrasting ways (right hand on the side of the door in the first shot, behind the door using the left hand to push it closed in the other). (00:41:35)