The biggest alien invasion picture of the summer of 1996 is Independence Day. But it's not the first. The Arrival, with a significantly lower budget than Fox's July 3 release, has that distinction, and, while this particular film doesn't boast any radical or surprising ideas, it combines numerous familiar plot elements into a suspenseful, entertaining whole. Best of all, perhaps, is the realization that some thought went into writer/director David Twohy's script. This is not a dumb movie; in fact, with its heavy reliance upon real science, it's startlingly credible.