Screamers

Screamers were the bat-like beings of the planet Desperus, whose loud noises gave them their highly thought-through name. They had a tendency to attack and eat criminals stranded there.
Podcast C021 The Daleks’ Master Plan > > > > > > > > > > > > > > > > >

The Doctor robs the Daleks, gains two companions, loses three, and then we even get an appearance by the monk. Epic!