Bold Venture is the radio adventure series starring Humphrey Bogart and Lauren Bacall that originally aired in 1951-52. Bogart plays hotel and boat owner Slate Shannon, and Bacall plays his ward, Sailor Duval.   https://en.wikipedia.org/wiki/Bold_Venture  Spanish Gold (a.k.a. Treasure On Flamingo Cay) aired November 19, 1951 Beginning in March 1951, the Frederic W. Ziv Company syndicated 78 episodes via electrical transcription. Heard on 423 stations, the 30-minute series earned $5,000 weekly for Bogart and Bacall.