Twilight Zone Radio Dramas

The Zero Hour (aka Hollywood Radio Theater) was a 1973–74 American radio drama anthology series hosted by Rod Serling. With tales of mystery, adventure and suspense, the program was broadcast for two seasons. Some of the scripts were written by Serling.

Originally placed into syndication on September 3, 1973, the series was picked up by the Mutual Broadcasting System in December of that year. The original format featured five-part dramas broadcast Monday through Friday with the story coming to a conclusion on Friday. Including commercials, each part was approximately 30 minutes long. Mutual affiliates were free to broadcast the series in any available time slot that they wished.

In 1974, still airing five days a week, the program changed to a full story in a single 30-minute installment with the same actor starring throughout the week in all five programs. That format was employed from late April 1974 to the end of the series on July 26, 1974.

Producer J. M. Kholos was a Los Angeles advertising man who acquired the rights to suspense novels, including Tony Hillerman's The Blessing Way, for radio adaptations. In some cases, the titles were changed. For example, the five-part "Desperate Witness" was an adaptation of The Big Clock by Kenneth Fearing. To create a strong package, Kholos followed through by lining up top actors, including John Astin, Edgar Bergen, Joseph Campanella, Richard Crenna, John Dehner, Howard Duff, Keenan Wynn, Richard Deacon, Patty Duke, Nina Foch, George Maharis, Susan Oliver, Brock Peters and Lurene Tuttle.