Archive on 4, previously The Archive Hour, is a BBC Radio 4 programme which compiles audio clips from the station's archives, around a different theme in each edition.
A variety of guest speakers, often with a connection to the week's subject, present the show.
The programme is broadcast on Saturday evenings at 8pm in the United Kingdom, and is available online via iPlayer, as is an archive of past issues.
The programme's BBC Programme Identifier (PID; a unique identifier) is b00hg8dq. For the Archive Hour, it was b006qmtp.
References
Archive on 4 Wikipedia(Text) CC BY-SA