Patzer

Finn's boat catches fire, blows up, and burns to a crisp. When he dives down 10 minutes later, the boat is intact. He even retrieves a picture from a bulletin board, in perfect condition.

When Finn catches Gemma's hat, he lands on his right shoulder. In the next shot, he is lying on his left shoulder and wincing in pain.

Gemma arrives on Nigel's yacht, which has no helipad, via helicopter. Nigel greets her as she walks up a staircase. The helicopter would have landed on the roof, so she should be coming down, not up.

When Tess is lowered into the blow hole, the knot around her body is a bowline. Later in the scene, it's a square knot.

The view out the front of the airplane from the pilot's seat is not from the Cessna 206 used for the outside shots. The view out the front has structural bars along the sides of the windscreen, which the 206 doesn't have.

Finn uses the Vespa headlight as a flash-light during the search in the cemetery. That would be impossible since that model of Vespa doesn't have an accumulator and the light goes on only when the engine is running.

Finn says to Bigg Bunny "we can cover twice the area in half the time". They can't. They can cover twice the area in the same time or the same area in half the time.

When Finn is flying the seaplane, the elevator clearly has the training edge down, which would make the plane nose over and dive into the water. When a plane is on the ground, such as blue screen shots for close ups, the yoke would sit naturally forward, placing the training edge down.

After the plane crashes and Tess comes to the surface, a scuba diver is clearly visible beside her, just under the water.

Key West, Florida and the Bahamas are flat, not mountainous.

When Gemma Honeycutt is leaving the Precious Gem on the runabout to go shopping in Key west, Nigel Honeycutt tells her not to be long. To which she replies that she is supposed to meet friends in Key Biscayne for dinner, but will try to get out of it. Key Biscayne is a village of Miami and lies 165 miles from Key West. This is unlikely because it would take 7 to 8 hours round trip to travel that distance in the runabout and she just flew in from Miami on the helicopter.

Moe Fitch's accent fluctuates between American Southerner and English Cockney.

Bigg Bunny tells Moe, "BiggBunny, it's one word," but later on Benjamin passes a sign for his rum that clearly spells it as two words.

How a name is pronounced and how it's spelled can be two different things.