As someone who hails from Belize, it was interesting to hear the babbling nonsense spoken by the FBI agent who was purporting to speak Kriol. She wasn't speaking Creole and nor was the tow truck driver.
There are no rental Jeeps on San Pedro. It is a small island with few roads, and tourists can only rent golf carts.
There are no mountains on the island of San Pedro. The scenes of driving through mountains and hills are totally incorrect.
The Canadian victim, Trish, went missing 3 years ago but her child appears to be older than 27 months.
There are no tow truck drivers based in San Pedro who search the non existent mountains for rental jeeps that cannot be hired.
After identifying the kidnapper, Simmons mentions that the kidnapper would have used the GPS in the rental cars to find his victims. Why, then, didn't the team use GPS to find John and Susie's jeep?
When being briefed about the missing couple, Clara says "on a rural road, at night. Do you think maybe they saw something they shouldn't have?"
At this point, all the team knows is that the couple is missing; they have no information about them driving on a rural road.
Although the script makes it clear that the two skeletons are the remains of the killer's first two victims and that his MO includes hacking the victim's feet and hands with a meat cleaver, the long bones of the skeletons are complete, not cut at the base as it would be expected after such procedure.
At 1:00: the newlyweds stop to take a selfie. The result shows the background is a different angle with more lighting on the water. Plus, they both have big smiles (w/teeth), a more polished look overall and her ring/hand position is lower.
Like many Americans, Jack makes the mistake of using the Spanish stock phrase "mano a mano" in place of "man to man". In reality, the intended meaning of "mano a mano" (lit. "hand by hand") is "one step at a time".
The kidnapper's home has a Kitchen Aid stand mixer on the counter. This is unlikely for a working class person in a fairly poor country.