The Hound of the Baskervilles

Originally proposed by brief Hammer cohort Kenneth Hyman, this movie was planned to be the first in a series of many Sherlock Holmes movies starring Peter Cushing, produced by Hammer Films. After the audiences disapproved of a Hammer movie without any monsters and failed to turn up in great numbers, the planned series was subsequently dropped.

In their discussion regarding the source of the tarantula used to attack Sir Henry, Watson asks Holmes how he knew the spider had not secreted itself with Sir Henry's luggage from South Africa and instead came from the collection of a local and eminent entomologist, Bishop Frankland. In classic form, Holmes says, "Elementary, my dear Watson, tarantulas are not from South Africa." He is wrong, as tarantulas, such as the baboon spider, are native to South Africa. A bit earlier in the film, Bishop Frankland asks if the tarantula in question had originated from one of the village. Here the expert was mistaken as tarantulas are not native to the countryside or villages of England. (To be fair, the good clergyman may have been trying to avoid admitting that a tarantula loaned to him by the London Zoo had gone missing.)