As with many of us "of a certain age" (i.e., aged) "Sky King" was a huge part of childhood. It ignited a lifelong interest in airplanes as well as reinforcing another aspect of personality. No one else has bothered to mention that Penny was gorgeous! I recall not one plot and do remember thinking that, like several others, the early 50s series were overshadowed by the mid- to late-fifties Westerns.