Casts
William Boyd
as Hopalong Cassidy
Andy Clyde
as California Carlson
Rand Brooks
as Lucky Jenkins
Robert Emmett Keane
as Professor Dixon
Jane Randolph
as Jessie Dixon
Fred 'Snowflake' Toones
as Speed
Steve Barclay
as Bruce Landy
Harry Cording
as Duke
Earle Hodgins
as Sandler
William 'Wee Willie' Davis
as Blackie
