Luther: 3x2

( Idris Elba ): The brilliant but embattled detective.

The investigation leads to William Carney, an aging serial killer in a care home. Luther discovers Carney has been mentored by a "pilgrim," Paul Ellis, who is carrying out the new murders. Luther 3x2

( Warren Brown ): Luther's loyal partner who must decide whether to testify against him. ( Idris Elba ): The brilliant but embattled detective

( Ned Dennehy ): The disturbing original "Creeper" providing guidance to the new killer. " Paul Ellis

Luther corners Paul Ellis, who ultimately flings himself through a window rather than being captured. "Luther" Episode #3.2 (TV Episode 2013) - IMDb

( Kevin Fuller ): The mute, depraved killer acting as Carney's disciple.