Episode #2.8 - S2-E8
Continuity mistake: One of the very first beautiful people shown in the episode is a woman with very short and very blonde hair, wearing a colourful dress as she stops to chat up a woman in a polka dot dress. The camera pans outside and finds Camille who is reaching Poole. And next to him, the same lady is already there, chatting with a different person in a totally different part of the property. (00:00:10)
Episode #2.8 - S2-E8
Visible crew/equipment: The cameraman is reflected in the glass of the door during the first shot of the episode, as from inside the house we go outside. (00:00:20)
Episode #2.8 - S2-E8
Audio problem: Vicky had just introduced herself to Camille when a gunshot is heard. Everyone reacts as you'd expect with such a loud and sudden noise exploded in the middle of a party, everyone except in a brief cut to Duncan Wood. Nobody in that shot is perturbed by the bang in the slightest. (00:02:50)
Episode #2.8 - S2-E8
Continuity mistake: Entering the house after the gunshot, Camille holds back Vicky Woodward with both hands, becoming one hand in the next shot. (00:03:00)
Episode #2.8 - S2-E8
Continuity mistake: In the first examination of the body, Fidel photographs the wound. Poole appears behind him and asks "So?"Behind Poole, you can see the air conditioning unit, turned off and with its grid closed. Seconds afterwards, Poole peeks above the desk and the plot point establishes that the A/C is running. (00:04:35)
Episode #2.8 - S2-E8
Continuity mistake: Checking out of the crime scene, Richard puts the plane ticket down after the interview with the PA is over. In close-up the ticket lands diagonally across the bottom side and the left side of the organizer, but in the shots of the room the ticket is placed on the top side of the page. (00:09:00)
Episode #2.8 - S2-E8
Continuity mistake: In the scene with Richard bossing Camille around with his brisk finger-waving, she is pinning in place the red tape using just two fingers pointed against the book or her hand hovering on top of it, clenched in a fist, depending on the angle. (00:09:50)
Episode #2.8 - S2-E8
Continuity mistake: Richard lifts the soft paper towards the UV light picking it with his tongs by the far corner - in the close-up the strip is pinched right in the middle of it, though. (00:24:25)
Episode #2.8 - S2-E8
Continuity mistake: During the denouement, DI Richard Poole holds the evidence bag with the murder weapon showing it to his audience. The bag is held differently between shots, as the blue bands make easy to spot. (00:37:35)
Episode #2.8 - S2-E8
Continuity mistake: When the murder is shown, the killer grabs the gun with both hands at first, then the close-up shows them pick the gun from the drawer with just the left hand. (00:39:40)
Episode #2.8 - S2-E8
Continuity mistake: When the killer walks away from the victim, his right arm touches the carpet in the first shot, is above it in the next, and was even further distant from it in the one before the opening roll of the episode. (00:40:00)
Episode #2.8 - S2-E8
Continuity mistake: In the whimsical finale, Richard rips away from Dwayne's hands the envelope with the test results; the envelope switches side multiple times between shots - just look at the stampings and how they change position from cut to cut. (00:42:40)
Episode #2.8 - S2-E8
Continuity mistake: Fidel grabs the envelope with his results. Brief reaction shot on Dwayne and Poole, and suddenly the beer bottle and Best's cell phone have rotated. (00:43:00)
Episode #2.8 - S2-E8
Other mistake: Richard states that all 33 of the prints he recovered from the cash wraps were by the victim, but we see the secretary in flashbacks collect them from the garbage bin with no gloves, which would leave obvious prints that can't be washed away - the presence of prints wouldn't even be all that incriminating per se, since it wouldn't be terribly strange for the personal assistant to momentarily handle some money inside her boss' office.
Answer: Most likely they had only tropical exotic drinks, he wanted an old fashioned English beer.