Radio Patrol - 0★

Grant Withers - Officer Pat O'Hara

Adrian Morris - Officer Sam Maloney

Kay Hughes - Molly Selkirk

Mickey Rentschler - Pinky Adams

Frank Lackteen - Mr. Tahata, alias Warner the Great

C. Montague Shaw - Mr. Wellington

Harry Davenport - John P. Adams, inventor

Wheeler Oakman - Stevens, gang chemist

Max Hoffman Jr. - Harry Selkirk

Jack Mulhall - Desk Sergeant

Earl Dwire - Jeremiah Crockett

Dick Botiller - Henchman Zutta

Ernie Adams - Hobo

Hooper Atchley - Casey

Stanley Blystone - Plant Foreman