Episode 25 released in syndication on June 18, 1950. Stars William Boyd as Hopalong Cassidy and Andy Clyde as California Carlson.   Hopalong Cassidy is a radio western in the United States, featuring the character Hopalong Cassidy created by writer Clarence E. Mulford. It was syndicated via electrical transcription, beginning in 1948 and continuing into 1950. Its network broadcasts began on Mutual January 1, 1950, and ended on CBS December 27, 1952.

https://en.wikipedia.org/wiki/Hopalong_Cassidy_(radio_program)