Audio problem: In several episodes, there is a shot of the grandfather clock in the downstairs hall. When the camera comes in for a close-up of the face of the clock, a chime can be heard. It is the Westminster chime, which normally sounds on the quarter hour (4 notes), the half (8 notes), the three-quarter (12 notes) and the hour (16 notes plus the number of hours). However, on several occasions, the clock is off-strike, either by the number of notes it chimes or chiming when it normally would not (for example, at 11:20).
Other mistake: 1795: A black-and-white cat, supposedly the transformed Joshua Collins, was completely uncooperative in every scene he was in. He always started out on a bed or a chair, but got up and left every time, usually forcing the camera to pull in so that the actors could pretend the cat was still there.Jean G