Revealing mistake: All of the exterior shots of Jessica and Hagarty are wide shots with very obvious stand-ins. Jessica is thinner and younger, while short-haired Hagarty's double is younger, chubbier, and has long hair around the nape.
The Murder of Sherlock Holmes - S1-E1
Revealing mistake: In part 2 of the episode, when Jessica is mugged, Angela Lansbury is replaced with a younger and thinner stunt double twice: when she runs away and when she protects herself against the wall.
Revealing mistake: When Jessica rides on the motorcycle, one can see it's a much younger and thinner stunt double who doesn't resemble Angela Lansbury.
Revealing mistake: After Denton falls off his horse, Jessica arrives and jumps off hers. Her stand-in is a much younger and thinner woman who looks nothing like Angela Lansbury.
Death Takes a Curtain Call - S1-E9
Continuity mistake: The way the sheriff hands over the phone to Major Anatole Karzofman differs between the first and second shot, with the handset turning 180ยบ.
Death Takes a Curtain Call - S1-E9
Continuity mistake: When Jessica questions Eddington, he has his glasses on. An instant shot later, they're on his hand.
Death Takes a Curtain Call - S1-E9
Visible crew/equipment: When Jessica and the Russians exit the theatre, the whole filming crew and cameras are reflected on the car's fender.
Visible crew/equipment: When Jessica gets trapped in the car, lighting equipment is reflected on the window.
Visible crew/equipment: Jessica is at the crime scene with the detective and walks from the back of the set to the cemetery. The moving shadow of the camera is cast on a rocky wall. (00:17:33)
Visible crew/equipment: After Seth drives Jessica downtown, lights, crew, and filming equipment are reflected on the car window.
Visible crew/equipment: When the cop grabs the coffee pot, a filming crew member with blue trousers is reflected on it.
Who Killed J.B. Fletcher? - S7-E14
Factual error: Bremerton, Washington is not a hick town as depicted in this episode (it is the home of Puget Sound Naval Shipyard, a US Navy installation that employs 14,000 people) and the people there do not have southern accents.
Dead Letter - S6-E6
Factual error: Unlike the Connie Kowalski character in this episode, real insurance investigators are not trained in arson investigation. Insurance investigators search for evidence of fraud relating to insurance claims. Arson investigators are professional firefighters who have had extensive additional training in arson investigation.
Fire Burn, Cauldron Bubble - S5-E13
Factual error: The only instances of "witchcraft" or "witch trials" in America were in Salem, Massachusetts. There were none in Maine or anywhere else. The Salem witch trials spanned 15 months, from February, 1692 to May 1693. Over 200 people were accused of witchcraft, but only 30 were found guilty. Of the 30, 14 women and 5 men were executed by hanging and one man, Giles Corey, was executed by "pressing." Another five died in jail, but none were burned at the stake, which was a punishment unique to Europe.
Factual error: When Buck's body is found, his blood is red when it should be brown due to oxidation after how much time has passed.
A Very Good Year for Murder - S4-E17
Visible crew/equipment: After Tony is cured he exits toward his car. A big screen used for lighting is reflected on the side of the car.
Visible crew/equipment: When the sheriff and the mayor meet at the fix-it shop, the filming crew plus the boom mic pole are reflected on the side of the red car.
Night of the Headless Horseman - S3-E11
Visible crew/equipment: When Nate and Dorian fight at the bar they are replaced with obvious stunt doubles with totally different hairstyles.
Night of the Headless Horseman - S3-E11
Visible crew/equipment: When Jessica arrives at the station and Dorian opens the car door, stage lighting screens are reflected on the glass.
Night of the Headless Horseman - S3-E11
Visible crew/equipment: When Nate Findley rides his horse the actor's stunt is very noticeable in the wide shots.
