[4] In contrast, the revised Cassidy was described by radio historian John Dunning as "a knight of the range, a man of morals.
"[2] A newspaper story about the program's debut on Mutual commented, "The radio broadcasts will be specially scripted to highlight the personality, mannerisms and unusual adventures of the steely-eyed, justice-dealing, gun-toting cowboy hero.
'"[6] After a slow start (when producers Walter and Shirley White "were paying production costs for new episodes as money came in from initial clients"), the popularity of Hopalong Cassidy on radio began to increase.
[2] In 1948, a Hopalong Cassidy television series began, first shown on KTLA in Los Angeles, California.
"One medium fed on the other," Dunning wrote, and "for two years [Boyd] was as big a media hero as the nation had seen.
An ad in the 1949 issue of Broadcasting Yearbook proclaimed: "THIRTEEN YEARS OF MOTION PICTURE POPULARITY BEHIND IT!