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.
#1Hop-a-long Cassidy
#2The Eagle's Brood
#3Bar 20 Rides Again
#4Call of the Prairie
#5Trail Dust
#6Hopalong Cassidy Returns
#7Heart of the West
#8Three on the Trail
#9Borderland
#10North of the Rio Grande
#11Rustlers' Valley
#12Hills of Old Wyoming
#13Texas Trail
#14Hopalong Rides Again
#15The Frontiersmen
#16Bar 20 Justice
#17Pride of the West
#18Cassidy of Bar 20
#19In Old Mexico
#20Partners of the Plains
#21Heart of Arizona
#22Range War
#23Law of the Pampas
#24Sunset Trail
#25Silver on the Sage
#26Renegade Trail
#27Santa Fe Marshal
#28Hidden Gold
#29The Showdown
#30Stagecoach War
#31Three Men from Texas
#32Pirates on Horseback
#33Riders of the Timberline
#34Doomed Caravan
#35Wide Open Town
You’re hereTwilight on the Trail
#37Border Vigilantes
#38Outlaws of the Desert
#39Stick to Your Guns
#40Secret of the Wastelands
#41In Old Colorado
#42Lost Canyon
#43Undercover Man
#44Colt Comrades
#45Riders of the Deadline
#46Leather Burners
#47Hoppy Serves a Writ
#48Bar 20
#49Border Patrol
#50False Colors
#51Forty Thieves
#52Mystery Man
#53Texas Masquerade
#54Lumberjack
#55The Devil's Playground
#56Fool's Gold
#57Hoppy's Holiday
#58The Marauders
#59Unexpected Guest
#60Dangerous Venture
#61Sinister Journey
#62Strange Gamble
#63Silent Conflict
#64False Paradise
#65Borrowed Trouble
#66The Dead Don't Dream