A number of people in recovery testified, including Academy Award-winning actress Mercedes McCambridge, National Council on Alcoholism founder Marty Mann, and AA co-founder Bill W. In his autobiography, The Man from Ida Grove: A Senator's Personal Story, Hughes writes that he asked a dozen other well-known people in recovery to present public testimony, but all declined.
The Verse Speaking Choir worked under contract with NBC Radio and its participants included Mercedes McCambridge ('37), Academy Award and Golden Globe winner.
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The prime time series featured such future stars as Eva Marie Saint (Claudia), Tony Randall (Mac), Mercedes McCambridge (Beth Holly #1), and Frankie Thomas (Cliff Barbour #1).