Starring Humphrey Bogart and Lauren Bacall. From Dick Judge's Bold Venture log:
Bogart potrays Slate Shannon, owner of a rundown Havana hotel, Shannon's Place. The action took place on land as well aboard Slate's boat, The Bold Venture, thus the title of the series.
Lauren Bacall was his ward Sailor Duval, a stubborn and flirtatious young woman whose late father had willed her to Slate for her protection. Together the duo found adventure, intrigue, mystery and romance in the sultry settings of tropical Havana and the mysterious islands of the Caribbean.
Note: The titles and dates for this series are very confused. I am in the process of getting things straightened out. In the meantime, please refer to the excellent Bold Venture log at old-time.com for more info.
Here is a sample of the online episodes currently available at The Old Time Radio Fan: