William Boyd insisted on speaking grammatical English during this series, because he knew so many children would be watching and wanted to set a good example.
From 1949 to 1953, NBC aired 52 theatrical films of "Hopalong Cassidy". This series, consisted of 40 new episodes made for TV, a half-hour in length, plus 12 additional theatrical features that were edited to fit the 30-minute time slot.
When old Hopalong Cassidy movies were shown on TV for the first time in 1948, "Hoppy" becomes television's first hero for kids and they started to dress like him.
Edgar Buchanan, who played sidekick Red Connors, would later have the starring role as Roy Bean, ein Richter im wilden Westen (1955), a series that was produced by an earlier Hopalong Cassidy sidekick, Russell Hayden, who played "Lucky" from 1937-41.