Ok, I haven't seen many episodes of this program, so my review is only considering the episode plot in general. I watched this episode because of Alex Kingston's appearance in it and I don't know any of the main characters.... I thought the eventual outcome of the crime was a good one. However, I can't bring myself to call it 'well-written' as I believe that for a crime drama to be a good one, it needs two parts to each episode. In forty-five minutes, there's no real time for plot development or character involvement. That meant that the kidnapping happened, we got told about it, a possible criminal was investigated, and hey presto, the team worked out who it really was. I would have preferred the episode, had suspicion not pinpointed the true guilty culprit so early on. If there were still various possible suspects, and I was kept in suspense, the whole thing would have been much better.
I also don't think the characters were developed sufficiently. Alex Kingston played Lucy, a woman who must have been very cold, capable and intelligent to arrange two murders. However, we saw her as a nervous wreck at the beginning of the program, but as soon as she was being investigated, her character became impersonal and arrogant. Quite simply, I don't believe that was realistic. She would have used her injured wife acting skills a little longer if she really did have the capacity in the first place to arrange the murders.
One thing I'm unsure about, is where the program stands in relation to Latin America. I can't really comment based on one episode, but I would hope that Mexico normally gets a better viewing than it did today.
Regarding Alex Kingston, I don't get why she couldn't have just played a British person - the accent was ridiculous. One minute it would be full-on American, but every now and again she would lapse back into the familiar British sounds.