Welcome back to Wild West Yorkshire

When Catherine discovers the remains of a gangland murder victim in a drained reservoir, it sparks a chain of events that unwittingly leads her straight back to Tommy Lee Royce.

Watch #HappyValley on iPlayer from 1 Jan at 9pm

All our TV channels and S4C are available to watch live through BBC iPlayer, although some programmes may not be available to stream online due to rights.