Idris Elba John Luther Actor, Associate Editor Ruth Wilson Alice Morgan Actor Warren Brown Justin Ripley Actor Dermot Crowley Martin Schenk Actor Nikki Amuka-Bird Erin Gray Actor Sienna Guillory Mary Day Actor Michael Smiley Benny Deadhead Actor Kevin Fuller Paul Ellis Guest Star Selva Rasalingam Craig Lane Guest Star Laura Pyper Jodie Guest Star Orlessa Altass Ayesha Guest Star Ned Dennehy William Carney Guest Star Lucian Msamati Ken Barnaby Guest Star Maria Miles Tessa Barnaby Guest Star Neil Cross Writer Phillippa Giles Executive Producer Leila Kirkpatrick Line Producer Katie Swinden Producer Sam Miller Director