A pirate radio station in the 1960s is threatened by an alien called the Hush, who kills everything that makes noise. The Doctor and the radio DJs try to trap the Hush before it devours the whole planet.

A pirate radio station in the 1960s is threatened by an alien called the Hush, who kills everything that makes noise. The Doctor and the radio DJs try to trap the Hush before it devours the whole planet.
