The story evolves around a radio panel game show "Twenty Questions." The panel is challenged with an anonymous question. The answer leads to a series of murders in which the killer uses the programme to name his victims in advance. Two reporters spot a link between them and enlist the aid of the panel in trapping the guilty party.
Robert Beatty
Rona Anderson
Clifford Evans
Edward Lexy
Olga Lindo
Daphne Padel
Jeanne De Casalis
Jack Train
Stewart MacPherson
Norman Hackforth
Richard Dimbleby
Harold Scott
Liam Redmond
Homi Bode
Kynaston Reeves
Sonya O'Shea
Frederick Leister
Wally Patch
John Salew
Gordon McLeod
Philip King
Arthur Young
Merle Tottenham
Meadows White