Anyone mad enough (1) to land on that crazy world (2) in order to rescue that screwball explorer should (3) have his head examined! I The first thing McCracken did was shoot a Mercurian native. But then McCracken, although he had powerful muscles, was never supposed to be very strong in the head. The expedition was in the Twilight Zone, naturally, at the time. Without special clothing, which no one had, both the perpetual night of the Cold Side and the furnace heat of the Hot Side were out of th