The Doctor and Peri find themselves in the Museum of Aural Antiquities, where every sound is stored for posterity – from the speeches of Visteen Krane to security service wire taps and interrogation tapes. But they also find an intruder, mysteriously changed recordings, and a dead body.

Before long the Doctor realises that there is more going on than a simple break-in or murder. How can he defeat a creature that is made of pure sound?

• The Doctor — Colin Baker
• Peri — Nicola Bryant
• Amber Dent — Rebecca Jenkins
• Goff Fotherill — Hylton Collins
• Visteen Krane — Matthew Brehner
• Radio Announcer — Harvey Summers
• Museum Curator Gantman — Peter Miles
• Miles Napton — Mark Trotman
• Detective Berkeley — Nick Scovell
• Hans Stengard — Steffan Boje
• Beth Pernell — Lisa Bowerman
• Computer Voice — Hylton Collins
• Car Computer — Rebecca Jenkins

• Big Finish Productions – Whispers of Terror