Towards the start of the film when Oddbod is trashing Bung's car he can be seen ripping the horn off and trampling on it. Yet later in the film the horn is back on the vehicle and is undamaged.
Harry H Corbett takes a drink and changes into a werewolf rips off his shoes and socks and goes to sleep but when he wakes up he's got his socks on.
[ at about 7 min, 45 sec. ] Sgt. Bung leaves his bedroom wearing only a shirt and tie; a few seconds later, he arrives at the police station also wearing a vest, suit and overcoat.
When Oddbod lifts the woman from the woman from the preparation table and puts her in the bath of green liquid, the woman has some obvious weight as he carries her. After immersing her in the liquid and picking her up to put into the second bath she is quite obviously a much lighter plaster model as he is no longer struggling to carry her.
Despite being set in the early 1900s, television aerials can be seen in some exterior scenes.
During one scene approximately one hour in, whilst being woken by electricity in a sitting position you can clearly see Kenneth Williams' right hand move to steady himself.
When Sergeant Bung wakes up in the bathtub and hits his head on the hot water tank, padding is visible on the bottom of the tank.
When Oddbod turns the handle which carries the cage in which the dummy is being carried, prior to it being dropped in the vat, the attached cables do not move.
On the print including the "A" rating at the beginning of the film, the copyright of the film is wrongly listed as 1916. This makes all of these copies of the film in the public domain, a fact suppressed by the alleged copyright holder.
When Sgt Bung pushes his wife over in the bed to retrieve his trousers (that are supposedly being pressed under the mattress) he clearly pulls the trousers from the side of the bed, not from under the mattress.
Despite the film being set in the Edwardian era, Dan Dann (Charles Hawtrey) is wearing NHS (National Health Service) issue spectacles which were not introduced until 1948.
When Sergeant Bung shows Valeria his police whistle, he explains that it doesn't work because he accidentally inhaled the pea. Bung's whistle is a Hudson type, manufactured by Hudson of Barr Street, Birmingham, and doesn't have a pea by design.
When Odd Bodd's finger is being examined, Bung asks, "Are you telling me that this finger has come from a creature that has been dead for 500 years?" If Odd Bodd is supposed to be an ancient, almost ape-man like creature, then he would be far, far older than a mere 500 years old --
nearer to 30,000 years old.