Tom, Harry, Neelix and Chakotay somehow return from a space mission with PTSD — and with memories of an armed conflict which might not even be theirs. All this goes just about as well as you’d expect, with inexplicable flashbacks, studio sets pretending to be outdoor locations, some odd gurning by Ethan, and some characteristically unpleasant shouting from the Worst Robert. But in spite of it all, there’s a point to be made, and some last-act location work lifts the whole thing considerably.