Three married couples gather to celebrate the eighteenth anniversary of their marriage mourning the absence of a friend who was best man at all three weddings.
| Directing | Roberto Gavaldón | Director |
| Crew | Óscar Lepe | Projection |
| Writing | Roberto Gavaldón | Screenplay |
| Writing | José Revueltas | Writer |
| Writing | Alejandro Casona | Theatre Play |
| Writing | Mauricio Magdaleno | Screenplay |
| Production | Gregorio Walerstein | Producer |
| Sound | Antonio Díaz Conde | Original Music Composer |
| Camera | Agustín Martínez Solares | Director of Photography |
| Editing | Juan José Marino | Editor |
| Production | Benjamin de León | Casting |
| Art | Jorge Fernández | Art Direction |
| Art | Pedro Gallo | Set Decoration |
| Costume & Make-Up | Armando Valdés Peza | Costume Design |
| Costume & Make-Up | Margarita Ortega | Makeup Artist |
| Costume & Make-Up | María E. Salazar | Hairstylist |
| Production | Jacobo Derechín | Production Manager |
| Directing | Manuel Muñoz 'Torito' | Assistant Director |
| Sound | Rodolfo Benítez | Sound Recordist |
| Sound | Abraham Cruz | Sound Editor |
| Sound | Galdino R. Samperio | Sound Re-Recording Mixer |
| Camera | José Antonio Carrasco | Camera Operator |
| Lighting | Juan Durán | Lighting Technician |
| Costume & Make-Up | Cristina G. de Escobar | Set Costumer |
| Directing | Manuel Alcayde | Script Supervisor |
| Art | Nicolás Rueda Jr. | Title Designer |
