Radio is an extraordinary medium.
A radio play can travel through time and space, between centuries and continents. All this can be done for a fraction of what it would cost to do the same in film. But in every case the audience has to be attracted, and its attention held, by the means of sound alone. We asked two award-winning radio dramatists, Marcy Kahan and Mike Walker , to share their secrets and to explain what makes an effective radio play. Themes You can write on any subject.