Hoppy, California and Johnny come to the ranch of a friend and his daughter, disguised as dude detectives from the east, to investigate the disappearances, without a trace, of several herds of cattle.
#1Bar 20 Rides Again
#2The Eagle's Brood
#3Hop-a-long Cassidy
#4Three on the Trail
#5Heart of the West
#6Hopalong Cassidy Returns
#7Call of the Prairie
#8Trail Dust
#9Hills of Old Wyoming
#10Texas Trail
#11Rustlers' Valley
#12Borderland
#13North of the Rio Grande
#14Hopalong Rides Again
#15Bar 20 Justice
#16Cassidy of Bar 20
#17In Old Mexico
#18The Frontiersmen
#19Partners of the Plains
#20Pride of the West
#21Heart of Arizona
#22Range War
#23Sunset Trail
#24Renegade Trail
#25Law of the Pampas
#26Silver on the Sage
#27Stagecoach War
#28Hidden Gold
#29Three Men from Texas
#30The Showdown
#31Santa Fe Marshal
#32Border Vigilantes
#33Pirates on Horseback
You’re hereTwilight on the Trail
#35Stick to Your Guns
#36Secret of the Wastelands
#37In Old Colorado
#38Wide Open Town
#39Doomed Caravan
#40Riders of the Timberline
#41Outlaws of the Desert
#42Lost Canyon
#43Undercover Man
#44Leather Burners
#45False Colors
#46Riders of the Deadline
#47Colt Comrades
#48Hoppy Serves a Writ
#49Bar 20
#50Border Patrol
#51Forty Thieves
#52Lumberjack
#53Texas Masquerade
#54Mystery Man
#55Fool's Gold
#56The Devil's Playground
#57The Marauders
#58Hoppy's Holiday
#59Dangerous Venture
#60Unexpected Guest
#61Borrowed Trouble
#62Silent Conflict
#63False Paradise
#64Sinister Journey
#65The Dead Don't Dream
#66Strange Gamble