Revealing mistake: "Alan a Dale": Lady Mildred rides side-saddle. But when Gisburne gallops away with her, some shots reveal that the stunt woman riding the fast-moving horse is astride it full straddle. Her skirt is blown back just enough to see a brief glimpse of the stunt rider's real leg on the horse's right, and the fake pair of legs in side-saddle position on its left. For just a moment, the lady appears to have three legs. (00:20:00)
Continuity mistake: Season 19, Episode 159. When Des Taviner flips and drives the area car wildly around an industrial estate and into a gas storage facility, you can see that during the sequence the Vauxhall Vectra he is driving starts off as a Y registration, then changes for several shots to a P registration, and then finally back to a Y registration when it blows up inside the building.
Revealing mistake: When the first scene at Emma's hideaway was shown, obviously the two characters Emma and Jessica were filmed seperately on the couch and then the film was put together (as both are played by Angela Lansbury). However Jessica did a lot of moving while she was talking, so Emma was looking straight across at where she had been, despite her bending down while she talked.
Other mistake: There is a sour bottle of wine that Jack and EZ taste in the kitchen - Jack throws the bottle in the sink and breaks it before Vicky and Mr. Bradford enter the kitchen and have a chance to taste it. There would be a strong sour smell all over the kitchen, but no-one in the room noticed any bad smell after the bottle of wine breaking.
Plot hole: The main characters are being pursued by Tripods, mind controlling alien machines. My question is, if the Tripods can turn humans into 1600's puppets, complete with foxhunts, why don't they make some of said mind-controlled humans help with the pursuit?
Continuity mistake: Episode 1 - When the commissioner kisses his wife at the beginning of the first episode, he is holding the holstered gun in his left hand and his ID in the right hand. That's in the first shot, because his daughter enters the room bringing coffee, and now the two items swapped hand. (00:05:10)