For over 20 years, the name John Agar on a marquee meant action to moviegoers - from World War II land, sea and air battles, to the frontier west, to the new frontier of 1950s science fiction, where he stood fast against some of the era's most memorable movie monsters. Agar's rise to fame was meteoric: During World War II, the $83-a-month buck sergeant met and later married "America's Sweetheart" Shirley Temple, and was soon offered a screen test and dramatic instruction by Hollywood mega-mogul David O. Selznick. He co-starred in his very first film, director John Ford's magnificent Fort...