Cine Film, S.A., Cooperativa Salvador Toscano presentan una producción de Juan Ramón Aupart Cisneros ; investigación, guión, edición, dirección, Juan Ramón Aupart Cisneros
Warner Bros.-Seven Arts presents a Phil Feldman production ; screenplay by Walon Green and Sam Peckinpah ; produced by Phil Feldman ; directed by Sam Peckinpah
Jupiter Entertainment ; History Channel ; A & E Television Networks ; executive producer, Stephen Land ; supervising producer, Geoffrey Proud ; producer, Michael Rogers ; writers, Matthew Edens, Tom Robertson
a film by Nettie Wild ; a Canada Wild production ; in association with the Canadian Broadcasting Corporation ; produced by Nettie Wild, Kirk Tougas, Betsy Carson ; written by Nettie Wild, Manfred Becker