The scope of the story is pretty large and the Mexican village is pretty detailed and filled with some extras and realistic Spanish language. It's got some mood from Psycho DP John Russel too, the best shot being a shadowy close up of the girl in the car when she first realizes her dangerous situation.
The whole story involves a conspiracy which is interesting and credible--a preview of the modern cross-border crime series THE BRIDGE and other real-life stories.
Wilding and Lee are too old to be her parents and neither of them overcome the perfunctory nature of their roles. Also director Crosland does a fairly poor job with the key moments of plot twist and a couple of pretty poorly staged fight scenes--the first of which features a really poor stunt double.
The young leads come off best but they do have to act pretty stupid at one key moment to keep the story going.
Outgoing Hitchcock bit even includes a bit of slop as an off stage director can be heard saying "Action" and you see Hitch quickly get into character, all this mistakenly on screen--for a few frames.
It's fast paced but another weak entry from producer Joan Harrison which is routine of 50's/60's TV on all levels, including story, than anything else.