This is a weird film, but not so much in Si-Fi terms, more in terms of the level of suspension of disbelief it requires of a viewer in terms of people’s choices and actions, like why the men in black leave them alone for ages after their trackers are turned off, instead of sending agents to pick up the trail and immediately find them. It’s kind of OK if you take it on its own terms (arguably better than, say, “They Saved Hitler’s Brain), but it you leave any of your critical faculties turned on it will become a difficult watch.