This happened back in 2009 and I first heard about it during a seminar at the AOPA Summit a few years ago. The passenger was a low time single engine pilot with his wife and two daughters onboard, who suddenly had to fly a multi-engine turboprop to save the life of himself and his family... Excellent work of both the ATC and the pilot. He's one cool cat under pressure.
Video with ATC and radar:
Here's an interview with the pilot: Link