Idris Elba John Luther Actor, Associate Editor Warren Brown Justin Ripley Actor Dermot Crowley Martin Schenk Actor Nikki Amuka-Bird Erin Gray Actor Sienna Guillory Mary Day Actor David O'Hara George Stark Actor Michael Smiley Benny Deadhead Actor Rupert Procter Terrence Conran Guest Star Michael Shaeffer Gordon Murray Guest Star Jason Riddington Alan Ramsey Guest Star Oliver Stark Shaun Butler Guest Star Gemma Lawrence Maxine Guest Star Ryan Calais Cameron Steve Meredith Guest Star Elliot Cowan Tom Marwood Guest Star Sam Miller Director Neil Cross Writer Phillippa Giles Executive Producer Leila Kirkpatrick Line Producer Katie Swinden Producer