Original radio air dates on CBS: October 18, 1943 to December 30, 1955

The actors portraying the main character switched frequently over the first
three years of the show’s run, starting with Bartlett Robinson, then followed
by Santos Ortega and Donald Briggs, before settling on John Larkin, who
played the famous attorney for the remainder of the broadcast. Della Street
was portrayed by radio soap queens; Gertrude Warner, Jan Miner, who was
Palmolive‘s "Madge" the Manicurist, and Joan Alexander who portrayed Lois 
Lane on radio’s Superman.

The series was adapted into Edge of Night which ran on television (CBS/ABC)
for an additional 30 years.

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John Larkin