Rio Lobo is a 1970 English-language Adventure Romance film directed by Howard Hawks and produced by Howard Hawks under the banner of Batjac Productions in collaboration with Cinema Center Films and Malabar. Bent on unearthing the cynical traitor who sold information to the enemy and caused the death of a dear brother-in-arms, the battle-tested former Union cavalry officer, Colonel Cord McNally, teams up with a pair of ex-Confederates after the Civil War. Now, as honest friends, the three companions ride into Rio Lobo--a dusty town in the middle of the desert overcome by corruption--to bring to justice the one who sold McNally out; however, the town is rife with the betrayer's murderous cut-throats. Can McNally avenge his bosom buddy and clean up Rio Lobo? Written by Nick Riganas. Rio lobo features John Wayne in the lead role along with an ensemble cast including Jorge Rivero, Jennifer O'neill, Jack Elam, Victor French, Susana Dosamantes and Christopher Mitchum. The screenplay is written by Leigh Brackett and Burton Wohl. The music was composed by Jerry Goldsmith. Cinematography was done by William H. Clothier and editing by John Woodcock. The film has a running time of 114 minutes. It was released on 17th December 1970. Rio Lobo was made on a budget of $6 million and at the box office it grossed only $4 million. Distribution rights for the film were acquired by National General Pictures.