Great episode of the Why Files, which my wife and I are awfully fond of. AJ is a great researcher and writer and Hecklefish is hysterical. You really need to watch this episode (one of the better ones, I think) to the end, because one of the hallmarks of the program is that AJ will set up a premise and then (if possible) debunk it. Nihil assumpseris.
It’s a non-refute at the end. Notice he has no answer for the van Allen belts radiation or the cosmic radiation outside the belts. Nor the lack of computing power to navigate the craft. Then he talks about alien bases!?!