Continuity mistake: The Commissioner visits Jack at his desk to get updates. Jack is busy with the tuning fork; during the sequence it is quite evident that the distance between his hand and the fork is different in the two main camera angles used. (00:32:00)
Continuity mistake: When Jack updates the Commissioner on how slowly both cases are going, his left arm is in a different position on the desk between shots. (00:32:30)
Continuity mistake: Florence is listening to the tape recording with her arms folded. When Jack and Dwayne say that the two on tape had an affair, Florence makes a comment; her hand is raised open or on her upper arm depending on the angle. (00:33:10)
Continuity mistake: At the silver wedding anniversary, Leon gives his speech about what everyone needs to "over-stand"; his hand is on the microphone, off it, on it again, etc.. (00:35:00)
Continuity mistake: Mayor Catherine Bordey approaches Dwayne at the melon stand and talks him into forgiving his dad. During the conversation, she has direct sunlight on her right side (shoulder, face) in the shots with the camera closer to her, and no rays whenever the camera is closer to Danny John-Jules. (00:36:55)
Plot hole: The plot resolution hinges on the fact that the culprit gave the illusion of the door being locked while the lock was already broken. And he did that by jamming under the door a rusty old fork, through the usage of a string. However, this appears really far-fetched to say the least; if the door was obstructed by an object under it, it would have not given way as if the lock was busted. It would have dragged, created a screeching noise and scraping the floor leaving visible marks (which considered it's a locked room mystery, would have been investigated). The person breaking in was Jack, even, who is supposed to be really perceptive and crime-savvy and not the average person.
Continuity mistake: In the episode finale, Dwayne's beer switches hands two times off-camera for no reason and with no visible movement of the actor's arms.
Murder on the Honore Express - S8-E1
Continuity mistake: When Florence pulls up next to D.I. Jack Mooney, every time the camera is directly on her, she has a seatbelt on. Every time the camera pans to the mirror reflection of her, she doesn't. (00:32:00)
Other mistake: The victim is shot and ends up in the swimming pool with a gaping exit wound. However there is no blood in the pool.
Beyond the Shining Sea: Part One - S8-E5
Continuity mistake: The video played on the mobile where Tiana is shown leaving on the boat shows her wave with her right arm. In the previous scene she waved from the boat with her left arm. (00:03:26 - 00:07:52)
Murder on the Airwaves - S8-E7
Continuity mistake: When the DJ is handed the LP at the start the way it's held changes position between takes. (00:02:35)
Continuity mistake: When we see Harry on the laptop, he runs off and the laptop switches from on to off.
Switcharoo - S9-E5
Continuity mistake: Emma brings Neville a plate with a sandwich, cut in half, while he is in the laundry room. Neville picks up the half of the sandwich closest to him, looks at it, and puts it back on the plate. He then picks up the half of the sandwich farthest from him, holds it for a brief minute, then puts it back on the plate. Only, the half farthest from him is already on the plate when he puts the one he's holding back. You need to look closely as this one was tough to catch. (00:33:20 - 00:33:45)
Switcharoo - S9-E5
Continuity mistake: Emma brings Neville a sandwich in the laundry room. Neville picks up the half closest to him and puts it back down. He then picks up the half farthest from him, holds it for a brief minute. When he puts it back on the plate, the half farthest from him is already there and he puts down the half closest to him. This was a tough one and I had to watch a few times. (00:33:20 - 00:33:45)
Continuity mistake: When JP is talking to Marlon who is having lunch, Marlon's napkin keeps alternating between blowing in the wind and hanging freely.
Revealing mistake: When they break the door to the nurses room down because it's locked, you can see the lock is retracted so there was no need to break the door down. (00:05:10)
Revealing mistake: The doctor closes the blinds on the ward and picks his phone up and makes a call. However, you can see the screen never comes on so how could he choose a contact to ring?
Continuity mistake: JP and Rosie go from having twins in episode 10.3, to having only a daughter in 10.8.
Answer: Most likely they had only tropical exotic drinks, he wanted an old fashioned English beer.