John Carpenter's Tales of Science Fiction: Interference Pattern #4

Synopsis

David makes fake credentials to get Alt-David back into the lab and the two of them get to work. Tensions run high, but after a few weeks, they're ready for another test flight. This time the results are even more unexpected than the last. And if that wasn't bad enough, upon their return, another dead body has turned up and the military police are breathing down David's neck. Time and options are running out�