Cast & crew
Duro pero seguro (1978)
Directed by Fernando Cortés Written by Fernando Cortés, Alfredo Varela, Damián Acosta Esparza
Cast
| Jesús González Leal 'Chis Chas' | Trabajador vidrios |
| Miguel Suárez | Ruperto |
| María Elena Velasco | Nicolasa |
| Claudio Brook | |
| Pancho Córdova | Frey |
| Alfredo Varela | Ramírez |
| Carlos Bravo y Fernández 'Carlhillos' | Vecino |
| Dolores Tinoco | Zenaida |
| Ángel Garasa | Don |
| Jesús González Gancy | (uncredited) |
| Jorge Lavat | Armando |
| Juan Garza | Policía |
| Jorge Fegán | Chucho-Chucho |
| Ana di Pardo | |
| Mario Zebadúa | Chaparro |
| Héctor Ortega | Periodista |
| Queta Lavat | Esposa |
| Alfonso Zayas | Mezcalito |
| Regino Herrera | (uncredited) |
| Maribel Fernández | Carmen |
| María Fernanda de Fuentes | Carmelita |
| El Mago Krotani | Mago Altanus |
Crew
| Sergio Guerrero | Original Music Composer |
| Xavier Cruz | Director of Photography |
| José Amezquita | Assistant Director |
| Graciela Muñoz | Makeup Artist |
| Fernando Cortés | Screenplay |
| Alfredo Varela | Screenplay |
| Fernando de Fuentes Jr. | Producer |
| Fernando Cortés | Director |
| Damián Acosta Esparza | Writer |
| Sergio Soto | Editor |
| Alfredo Varela | Story |