“Hostage X” (** out of four) was a mildly engrossing thriller about a man (Jeremy London) who awakens kidnapped in some foreign country with no memory of who he is but has to remember in a hurry or his kidnappers will kill him while a man he is on the phone with struggles to uncover his identity and get him help. Modestly made and thus yielding modest results but directed and acted with palpable tension until a queasy plot twist in the final third really negates London’s likeability and film’s ending is pointlessly obscure.