The Crowded Sky

A navy jet piloted by Captain Dale Heath (Efrem Zimbalist Jr.) and carrying an enlisted man (Troy Donahue) has already taken off when Heath realizes that both his radio and his navigation equipment have malfunctioned. They might be on the right course, but he can't tell if they're at the right altitude -- 500 feet too high or too low would put him in the path of a plane headed in the opposite direction -- and he can't get through to ground control to get a fix. Heath is quietly terrified at...