“Jericho Ridge” (**1/2 out of four) was a relatively gripping B-movie thriller about a small-town cop (Nikki Amuka-Bird) who finds herself trapped at her precinct and without backup and has to stay alive when she finds herself under siege by vicious attackers. Modest thriller is tensely directed by writer/director Will Gilbey and well-acted by Bird but rabid cinema fans may gradually find this too similar to John Carpenter’s “Assault On Precinct 13” which in itself was very similar to “Rio Bravo.” Still, it’s much better than most of its genre and worth watching.