The Destruction of Mondas

The Destruction of Mondas was one of the Cyber-Documents, a set of audio-visual documents originating from Earth, which were compiled into the CyberHive. Designated Document 3, The Destruction of Mondas was an account of the first recorded invasion of the planet Earth by the CyberMondasians and the resulting destruction of Mondas. (AUDIO: The Early Cybermen)

Behind the scenes
The Destruction of Mondas corresponds with the Doctor Who story The Tenth Planet.