I remember this series both on radio & TV as very superior fare full of existentialist romantic atmosphere. Morton Fine & David Friedkin were responsible for a lot of excellent radio programs including Broadway is My Beat (with lieutenant Danny Clover) & I Spy. Other shows the 2 created or worked on on TV included The Pawnbroker (which won the Writers Guild of America Award for Best Written American Drama in 1965), The Nativity, The Greek Tycoon, I Spy, The Next Man, The Most Deadly Game,& several television Westerns including The Rifleman, The Big Valley, Maverick.
A friend in the business once told me many years ago that Bold Venture scripts were all written in blank verse. I don't know if he was pulling my leg but they sure sounded that way.