It can move to any location. It can voice metaphysical, surrealist and subconscious feelings and images. The radio dramatist needs a creative interaction with the listener, and the ability of the radio dramatist to create a unique world in the listener's imagination is a special quality generally denied to TV viewers or theatregoers. Theatre, film and TV plays paint the colours for the audience, whereas the pictures in the mind of the radio listener are individual to that person alone. This gives radio a special intimacy.
Radio is very good at dramatising what people are thinking.
Interior thought' is a convention which is special to the radio medium. In radio the listener can be instantly transported inside the head of a character and can hear those secret, private thoughts that are often better left unsaid. Radio drama has been described as 'The Theatre of the Mind'. The potential conflict between exterior dialogue and speech and interior thought creates a special ground of conflict which is a fertile area for the creative radio playwright. The key to writing successful plays for radio is to realise that the listener can only understand what is going on by what he or she hears.