There is something about movies like Invasion that I get a kick out of and admire is a small way. Material like this feels like a throwback to the fifties and sixies, the dawn of sci-fi. I suppose that judging by those standards, one could make the argument that Battlefield Earth is a success, which may not be such a smart thing to do aloud. Regardless, Invasion is very cheesy, but it is amusing.
One night over Arizona, a shower of little black stones rains down on a city. The first to fondle of these stone is Beau Stark, an ordinary law abiding fellow. The tiny thing gives him an electric shock and before long he has a flu, which is messing with his mind. As more people handle the black pebbles scattered across town, the flu starts to spread, first across town then across Arizona and eventually the country. Stark is rallying his fellow infected citizens together to become part of some major plan to build a gateway to space which will (somehow) spell doom for humanity as we know it. Stark's girlfriend teams upwith a handful of Rogue doctors to try an find a cure, while everyone around is out to get them.
So what makes something like Invasion any better than say Battlefield Earth? It's a tough argument to make, but not impossible. For one thing Battlefield Earth feels muddled and badly paced, while this more is more temporaly believable (on account of being a three part programme of course). Time duration is very important for the credibility of a thriller or adventure story. More importantly, in Battlefield Earth you really don't care what happens to people. Here you end up actually rooting for and against who you are supposed to.
There are times when Invasion feels a little slow, and there are definitely some things that need to be changed, but the programme in general, is a good source of cheesy B-movie sci- fi. I don't know where you would find something like this, and I doubt if it will get any airtime in the future, but if it just happpens to be on the box one night and there is nothing else on (assuming you are a sci-fi geek) may as well watch for a bit.