"A group of juvenile delinquents live a violent life in the infamous slums of Mexico City; among them Pedro, whose morality is gradually corrupted and destroyed by the others."
Estela Inda
as Mother
Miguel Inclán
as Carmelo
Alfonso Mejía
as Pedro
Roberto Cobo
as Jaibo
Alma Delia Fuentes
as Meche
Francisco Jambrina
as School Principal
Jesús García Navarro
as Father
Efraín Arauz
as Cacarizo
Sergio Virel
as Ruffian
Jorge Pérez
as Pelón
Javier Amézcua
as Julián
Mario Ramírez
as Ojitos
Ernesto Alonso
as Narrator (uncredited)
Luis Buñuel
Director
Edward Fitzgerald
Production Design
Gabriel Figueroa
Director of Photography
Gustavo Pittaluga
Original Music Composer
Screenplay
Carlos Savage
Editor
Luis Alcoriza
Óscar Dancigers
Producer
Ignacio Villareal
Assistant Director
Federico Amérigo
Production Manager
Fidel Pizarro
Production Director
Antonio de Salazar
Administration
Rodolfo Halffter
Music Arranger
José B. Carles
Sound Recordist
Alberto Valenzuela
Assistant Editor
Music Director
Jesús González Gancy
Sound Director