The Silenian TestIgnore the title in the url: some of these are mis-titled. Speaking of titles and hence to title drops, I'd be very surprised if one of the models the people behind Vanishing Point wasn't The Twilight Zone.
Harry Price, living a Cold War existence perpetually on the edge of extinction, leaps at the chance offered by passing aliens to win for the Earth peace and access to the billion stars of the alien civilization [1], if only he can pass one simple test. He believes he passed and in so doing learns just how much he will pay for world peace and access to the stars.
Personally, I think he failed.
I liked how little time it took for giant alien space craft to go from the scariest thing in the world to "yeah, yeah, but who won the game between the Leafs and the Bruins?" and how mundane miracles are when you actually have them.
I am not 100% sure the David Lewis Stein I found online is *this* David Lewis Stein.
1: This may seem like an odd thing to praise an SF story for but Stein seems to have some idea how big a galaxy is and how big an advanced civilization could be.