Marple - A caribbean mystery -

I didn't like this one very much. It had a few good points, but there were more things I didn't like.
Miss Marple (Julia McKenzie) is taking a little vacation at a Caribbean village. She stays at a little resort run by English couple Tim (Robert Webb) and Molly. I find Robert Webb very nice, but I would have rather seen him in another story playing another character.
It all starts when an old major speaks to Marple about murder and is about to show her the picture of  a murderer who got away with it when he sees something or someone and changes the subject.
The next day he's dead. Heart attack, it would seem, and the local police is satisfied, but Marple isn't.
She has an ally in grumpy and rude Mr Jason Rafiel (sorry, I didn't like him).
It didn't seem bad at first, but then it went slowly but inexorably down. There were two couples of friends, the Dysons and the other ones. Lucky and her husband were not in love anymore but couldn't separate because apparently she killed her husband and then he married her so he would be considered an accomplice. She had an affair with the husband of the other couple, and had him do whatever she wanted, and now he can't take it anymore but is too weak to say no, and his wife knows everything, and I liked her a lot, this strong wife was my favourite.
There is a religious guy who apparently went to a voodoo woman for a love potion, to 'fall out of love' because he was in love with Molly and he thought it to be hopeless.
Molly is losing her mind, not remembering where she's been, seeing things that are not there and such.
Maid Victoria is found killed too, and all suspicions are on crazy Molly.
One night a body is found and they all think it is Molly, but then it turns out to be Lucky Dyson (not so lucky after all) with a shawl just like Molly's. I liked how Tim (well, Robert) said 'oh thank God', it  was very well said, because he was faking relief, and he rendered it perfectly.
I didn't like all that talk about voodoo, it had nothing to do with the real story and it was useless.
Marple reveals the solution when she stops Tim from killing Molly. He had previously killed his wife and got away with it. He wanted now to kill her so he would have been able to sell that land and make lots and lots of money. Businessman Rafiel was there to try and buy the land.
Tim was making Molly mad, poor thing, and he killed the major because he had recognized him that night, then he killed Victoria because she knew too much and had helped him making Molly crazy for money. He killed Lucky Dyson because he mistook her for Molly.
I was rather sorry that they changed Marple's intervention. In the book it was more exciting, her going to Rafiel saying she was the nemesis of the criminals, and asking him to 'lend her' Mr Jackson who was young and fit, with specific orders to do whatever she asked. I liked it more that way, but they changed it.
They added a scene that was supposed to be funny, I guess, or just a 'clever addition', I don't know. They put in the character of not-yet-famous Ian Fleming, who got the name of his famous spy from a man who was taking a lecture on birds; stuttering he said that his name was Bond..uh James Bond. Who would have guessed.

ITA Miss Marple nei caraibi