A Scandal in Belgravia, 02x01
So, the car’s about to backfire, and the hiker, he’s staring at the sky. Now, you said he could be watching birds, but he wasn’t, was he? He was watching another kind of flying thing. The car backfires and the hiker turns to look… which was his big mistake. By the time the driver looks up, the hiker is already dead. What he doesn’t see is what killed him because it’s already being washed downstream. An accomplished sportsman recently returned from foreign travel with… a boomerang.