Visible crew/equipment: When Clarence recounts the events of the night of the crime, a T-mark is visible on the floor.
Continuity mistake: When the sheriff grabs the bottle, his palm is facing upward to avoid leaving fingerprints on it. However, as he walks toward the exit, in the subsequent exterior shot he is holding the bottle with his palm facing downward. While there may have been a split second in which he could have changed his grip, the entire point of the scene is that he avoids touching the bottle altogether.
Visible crew/equipment: When the sheriff exits the gym carrying the bottle, rigs and filming equipment are reflected in the window behind him.
Revealing mistake: When Jessica enters the mortuary, the background is a blatant painted backdrop.
Continuity mistake: When Jessica arrives at the mortuary, she places her handbag over her left shoulder. Upon entering, she is holding it with her left hand.
Continuity mistake: The rosary wrapped around dead Hannigan's hand changes position between shots.
See You in Court, Baby - S7-E3
Visible crew/equipment: When Briscoe visits Dennis, multiple set lights are reflected in his lenses. These reflections cannot correspond to practical fixtures within the house, as no such light sources are visible in the reverse shots.
See You in Court, Baby - S7-E3
Visible crew/equipment: When Dennis finds Marcia in the house, he sits down and she follows. The shadow of the boom microphone can be seen moving downwards on the wall behind them.
Deadly Misunderstanding - S7-E2
Continuity mistake: Throughout the episode, Jeff's hair appears very dark brown, almost black. In the rainy night sequence when he meets Melissa, his hair is dark black in the classroom—likely due to being wet—but shifts to a noticeably brighter light-brown tone once it dries. In subsequent scenes, it returns to its original dark brown colour. This variation cannot be attributed to lighting, as in multiple other interior scenes his hair remains consistently dark brown.
Deadly Misunderstanding - S7-E2
Revealing mistake: In the shot where Ralph lies dead, the padding used to accommodate the stabbed scissors protrudes under his shirt.
Deadly Misunderstanding - S7-E2
Continuity mistake: Floyd holds the gas canister with either one hand or both hands, depending on the shot.
Deadly Misunderstanding - S7-E2
Continuity mistake: When Melissa is reading a magazine at home with her husband, the page count jumps inconsistently between shots, shifting from page 3 to page 50 depending on the angle.
The Murder of Sherlock Holmes - S1-E1
Visible crew/equipment: When Mr. Cellini meets Jessica Fletcher alongside her "refreshment committee" at the rehearsal, the camera's shadow is visible on his right shoulder when he walks to ask his assistant George to "sharpen up the last cue." (00:02:40)
The Sicilian Encounter - S6-E22
Visible crew/equipment: When Jessica sits down to read her mail, a square set light is reflected in the glass behind her. It does not belong to the house, as there are no practical square lamps positioned directly in front of Jessica.
The Sicilian Encounter - S6-E22
Visible crew/equipment: When Michael and Claudia are mugged on the street, actors' marks are visible on the ground.
The Sicilian Encounter - S6-E22
Visible crew/equipment: When Michael (AKA the priest) asks Claudia to step outside to hear her confession, visible T-marks can be seen on the floor.
Revealing mistake: When Bill is stabbed, the pad beneath his shirt - where the knife is stabbed - protrudes.
Visible crew/equipment: When the journalist leaves the premises and Jessica steps back inside the house, the camera rises to obtain an aerial view of the property. During this upward movement, the camera and crane operator—wearing a white hat and a red-and-blue coat—are reflected in the glass panel above the door.
Murder -- According to Maggie - S6-E17
Visible crew/equipment: When Jessica introduces the story and walks toward the coffee table, a chalk T-mark on the floor becomes visible on the left as she sits down.
How To Make a Killing Without Really Trying - S6-E14
Revealing mistake: When Jessica enters Gordon Tully's office and looks around, there's a photo of him with Buddy Black. The picture is an awful, poorly done composite: the lighting on their heads doesn't match the rest of the image, the head sizes are out of proportion with the bodies, and the overall light direction is inconsistent.





Answer: In a flashback scene, it was shown that he had a violent temper, so it stands to reason that he finally killed her in a fit of rage.