Episode #3.4 - S3-E4
Continuity mistake: At the beginning of the episode, when Natasha Thiebert walks away from the table, she walks past the colleague in a loud blue and red shirt (Max). In the close-up when she looks back at the table though, Max passes her by again. (00:00:50)
Episode #3.4 - S3-E4
Continuity mistake: Camille tests how hard it is to reach the room keys (answer; it is very easy). In close-up the key to 276 is unperturbed and with the actual key to the right of the rock, but in the wide shot the key is to the opposite side of the stone fob. (00:07:55)
Episode #3.4 - S3-E4
Continuity mistake: At the concierge during the first interview, the phone rings. Simone asks "May I?" pointing with her left hand, which becomes the right hand after the cut. (00:09:00)
Episode #3.4 - S3-E4
Continuity mistake: Summing up the lack of progress in the case in front of the whiteboard, Humphrey points at Bevans' picture with his right hand at first in the overhead shot, which becomes the left hand at the cut. (00:25:30)
Episode #3.4 - S3-E4
Continuity mistake: When Humphrey foolishly lets Catherine pick the dish for dinner, he lifts the menu and only the menu off the table, but in the following shot he has one of the blue paper towels underneath it. (00:27:30)
Episode #3.4 - S3-E4
Continuity mistake: When Catherine brings the casserole of deadly confit de poulet, Humph unfolds the paper towel in the first shot but it's still perfectly folded in the next. (00:28:10)
Episode #3.4 - S3-E4
Continuity mistake: Dwayne is reading the local newspaper when Camille and Humph get back from the hotel. The paper folds in opposite directions in the two separate shots. (00:36:40)
Episode #3.4 - S3-E4
Continuity mistake: The hands on the close-up of the phone record sheet are inconsistent with the wider angle (Goodman's left hand should be in frame). (00:37:10)
Episode #3.4 - S3-E4
Continuity mistake: When Goodman crawls to get the poison vial, it contains just a bit of liquid left at the bottom. Later when he checks it out at the station in greater detail and many close-ups, it's over half full. (00:40:40)
Episode #3.4 - S3-E4
Continuity mistake: During the denouement, Helen Walker's hair goes from still to windblown and back suddenly between cuts multiple times. (00:45:00)
Episode #3.4 - S3-E4
Continuity mistake: In the final part of the enquiry, Goodman pulls out of the evidence bag with the bottle of poison; the bag is turned differently between shots (check out of the small ribbed part in the corner, the bottle's cork). (00:45:40)
Episode #3.4 - S3-E4
Continuity mistake: Simone's reaction shot to Helen saying "I wasn't even here!" is flipped, as the position of her hair makes obvious (she wears the hair combed on the opposite side throughout the whole episode). (00:47:05)
Answer: There's probably no particular reason. Sets and props on long-running TV shows often change as needed and for various reasons throughout a series run.
raywest ★