This is an edited edition of Media Network which was released on transcription to other radio stations on 11 Jan 1995. In the light of the recent revelations by Edward Snowden about espionage currently conducted by the NSA and UK GCHQ, this programme from 18 years ago is rather tame. Spies were expected to sit infront of shortwave radios to take down a message on a one time pad. We talk to spy numbers specialist Simon Mason who made a lot of recordings in the last part of the 20th century and also knew where to find these strange voices.