After a two-year absence, the "Hopalong Cassidy" western series returned with The Devil's Playground. William Boyd, now executive-producer of the series, returns as Hoppy, with Andy Clyde as California Carson and Rand Brooks as Lucky Jenkins. More plot-oriented than earlier Cassidy efforts, Devil's Playground finds our three heroes coming to the rescue of widowed Mrs. Evans (Elaine Riley). The villain of the piece is Judge Morton (Robert Elliot), who hopes to force the heroine off her property for reasons unknown. Hoppy uncovers Morton's motivations and saves the day, but not without putting up one whale of a good fight. While Devil's Playground upheld the standard set by the previous "Hopalong Cassidy" films, the quality of the series would gradually deteriorate during the next eleven installments.