Boston Blackie is a fictional character that has occupied various positions on both sides of the law. Initially created by author Jack Boyle as a safecracker and criminal, the character evolved into a detective in adaptations for films, radio, and television. The premise of the radio series involves Boston Blackie, an enemy to those who oppose him and a friend to those in need, solving mysteries and inevitably encountering the often-confused Police Inspector Farraday. Throughout the series, a mixture of tension and camaraderie develops between Blackie and Farraday, as they navigate various criminal investigations with the help of Blackie's girlfriend, Mary Wesley, and other characters.

The Boston Blackie radio show aired from June 23, 1944, to October 25, 1950, with over 200 episodes produced during this period. The show initially began on NBC as a summer replacement for The Amos 'n' Andy Show, sponsored by Rinso. Later, the series was syndicated by Frederic W. Ziv to Mutual and other network outlets. The show featured notable actors such as Chester Morris, Richard Kollmar, Maurice Tarplin, and Jan Miner. The series had several sponsors, including Lifebuoy Soap, Champagne Velvet beer, and R&H beer.

Sources: archive.org, wikipedia.org, otrcat.com