The Uncertainty of Ethan Hunt

There were times when we were uncertain about whether or not the submarine worked. I wouldn't leave it in the movie just because we spent a bunch of money on it. That entire sequence could be employed in part two in a completely different way. It's just, again, goes back to that big logistical thing. Hey, we're going to build this set and then sit on it for a couple of years. For every dollar you spent, you got to earn three back.