《哨兵》是一部优秀的科幻片，主要演员有迈克尔·帕尔,杰森·R·摩尔,Ellie,Patrikios,Denitza,Diakovska,Neil,Cole,Paolo,Mazzini,John,Stewart,Arnold,Ivan,King Years after an alien invasion almost extinguished human mankind, refugee on a secret base on the Moon, three heroes decide to jump into a time travel in the desperate attempt to save the survivors but they don't know that the Sentinel is waiting for them.