Enjoyable police procedural about a kidnapped boy who turns up murdered. The only clue is a voice on the telephone. Fine performances by Madden and Miranda are offset by an awfully hammy one by Duryea, which unbalances the whole film. Still an interesting obscurity that plays like a very long episode of Z Cars.
Note: Passed by the BBFC 09 April 1964, then apparently shelved until it was shown on British teleivision in 1977.