Revealing mistake: In the later intros (when Mr Bean falls into a spotlight in a town) part of Mr Bean's foot isn't in the spotlight, but it still has a shine.
The Return Of Mr. Bean - S1-E2
Revealing mistake: When we see the close-up shot of Mr. Bean's new American Express card the first time, the name on the front is Mary.
The Library - S1-E3
Revealing mistake: In the extra 'Library' scene, the book that Bean is given already has the loose pages before he has been at them with the knife. (At one point the pages get pushed forward a little bit, meaning that they're not fastened into the book.)
The Library - S1-E3
Revealing mistake: Just before Mr Bean rips a page out of his book, there is already a tear in it just before he actually tears it, which is not visible in any of the preceding shots.
The Library - S1-E3
Revealing mistake: When Mr Bean's book falls apart, he tries putting the book back together, and he holds one page up to the camera and it has a slight reflection as if it is glossy paper. As far as I know old books like the one Mr Bean had don't have pages like that. It's an obviously fake book.
Revealing mistake: When Irma screams at seeing Mr Bean with his jumper pulled over his head, all of the other cinema patrons jump with shock - except for the woman directly behind the two of them, on the right of the screen. She just grins and laughs, forgetting that her character shouldn't be in on the joke.
Revealing mistake: When Mr. Bean forces the Reliant to reverse out of the car park and turn on its side, as it lays on its side it is obvious that the driver is a plastic dummy.
The Trouble With Mr. Bean - S1-E8
Revealing mistake: Near the beginning, when Bean is asleep, we see him put his toe over the hose to prevent the water from spraying out - however, if you watch closely, the water flow stops moments before his toe comes into contact with the hose.
Revealing mistake: In the train scene when Mr. Bean plugs his ears with his socks you can see that he didn't use the ones he was actually wearing before. Once he took them off he placed them in front of him but reached slightly to his right for the ones he plugged in his ears. Also those where still flat like after ironing them and didn't look worn at all.
Revealing mistake: When the dog jumps up at the Postbox, it wobbles slightly, meaning that it's a prop and not a real Postbox.
Merry Christmas Mr. Bean - S1-E10
Revealing mistake: When Mr. Bean gets his head stuck in the turkey looking for his watch it can be seen still on his wrist during a couple of scenes.
Merry Christmas Mr. Bean - S1-E10
Revealing mistake: The walls shake when Mr Bean slams the door on the carol singers.
Merry Christmas Mr. Bean - S1-E10
Revealing mistake: When Bean is driving down the street with the TV on his car, the sign for the store on the right is backwards, revealing a flipped shot.
Revealing mistake: When Bean silences the guest in room 427 after they were playing loud music, he accidently locks himself out. Later when Bean crawls under a carpet past his room to hide from a kissing couple, room 427 has changed into a fire exit (you can see the room number has been replaced by a fire exit sign).
Do-It-Yourself Mr. Bean - S1-E13
Revealing mistake: At the end when Mr. Bean blows up the paint and it splatters all over the walls in his apartment, he comes back in and his doorknob is covered in wet white paint which he pushes shut. Only problem is that when he pulls his fingers back, there is no wet paint whatsoever on them. (00:23:30)
Do-It-Yourself Mr. Bean - S1-E13
Revealing mistake: After Mr. Bean crashes into the van with the feathers in it, and then goes inside, he coughs, and feathers supposedly come out of his mouth. However, from the way he does it, you can see the feathers were in his hand to start with.
Mind The Baby, Mr. Bean - S1-E14
Revealing mistake: At the beginning when Mr. Bean gets the baby's pram attached to the back of his car, as he drives off you can see that the baby is a fake doll. (00:01:50)
Mind The Baby, Mr. Bean - S1-E14
Revealing mistake: In the scene where Mr Bean squeaks the baby toy and is chased by the dog, the dog handler can be seen just to the right of Mr Bean giving commands before ducking behind two extras. (00:16:15)
Mind The Baby, Mr. Bean - S1-E14
Revealing mistake: When Mr Bean drives off in his car with the baby's pram attached to the back of it, you can see that the baby is missing.
Revealing mistake: When Mr. Bean shoots the golf ball out of the sewer, you can see that the ball is already waiting at the hole where it was probably shot with an air cannon.
