Walter Hill is an American film director, screenwriter, and producer. He is widely known for his action films including, The Warriors, Hard Times, The Driver, Southern Comfort, 48 Hrs. and its sequel Another 48 Hrs., Red Heat, Last Man Standing, Undisputed, and Bullet to the Head, as well as writing the Steve McQueen crime drama The Getaway.
 
Matz aka Alexis Nolent is a French writer. He writes scripts for videogames and has also written a novel and, under the Matz pen-name, a number of comics. His graphic novel, Du Plomb Dans La Tete, AKA Headshot was adapted into the 2012 film, Bullet to the Head.
 
Jef is a French comics artist and designer who has illustrated several titles including Body and Soul, Hunt and Jim Morrison: Poet of Chaos.