Lucky Luke moet Louise helpen haar moeder te vinden, die op mysterieuze wijze is verdwenen, terwijl hij tegelijkertijd een complot moet dwarsbomen dat de loop van de Amerikaanse geschiedenis zou kunnen veranderen.
| Writing | Mathieu Leblanc | Screenplay |
| Writing | Thomas Mansuy | Screenplay |
| Directing | Benjamin Rocher | Director |
| Production | Géraldine Gendre | Producer |
| Production | Rémi Prechac | Producer |
| Production | Lionel Uzan | Producer |
| Production | Julien Vallespi | Producer |
| Writing | Morris | Comic Book |
| Production | Alban Lenoir | Producer |
| Camera | Steeven Petitteville | Director of Photography |
| Art | Sonia Nolla | Supervising Art Director |
| Art | Mani Martínez | Production Design |
| Production | Emmanuelle Prévost | Casting |
| Production | François Rivière | Casting Director |
| Art | Sonia Nolla | Set Decoration |
| Costume & Make-Up | Pepo Ruiz Dorado | Costume Design |
| Costume & Make-Up | Federico Calcatelli | Hairstylist |
| Costume & Make-Up | David Huerga | Makeup Artist |
| Costume & Make-Up | Cristina Martín de la Fuente | Makeup Artist |
| Costume & Make-Up | Sylvie Imbert | Makeup Supervisor |
| Costume & Make-Up | Noé Montes | Hair Designer |
| Costume & Make-Up | Lola Ruiz | Assistant Makeup Artist |
| Production | Deborah Boulanger | Supervising Producer |
| Production | Hubert Brault | Line Producer |
| Production | Marc Libert | Supervising Producer |
| Production | Nath Rodriguez | Unit Production Manager |
| Directing | Alexis Arderius | Second Assistant Director |
| Directing | Maria Bardi | Second Assistant Director |
| Crew | Thalia Berral | Floor Runner |
| Directing | Mathilde Dory | Second Assistant Director |
| Directing | Yann Garcia | Third Assistant Director |
| Directing | Miguel Machetti | Third Assistant Director |
| Directing | Inés Sorlat | Third Assistant Director |
| Crew | Nicolas Sorlat | Floor Runner |
| Directing | Paul Vallespi | First Assistant Director |
| Art | Laia Castellví | Assistant Property Master |
| Art | Vanesa de la Haza | Property Master |
| Art | Paula González Molinero | Standby Property Master |
| Art | Edu Glez | Graphic Designer |
| Art | Louise Pichon | Assistant Set Decoration |
| Crew | Rayco Benítez | Special Effects Technician |
| Crew | Esteban Roma | Special Effects Technician |
| Crew | Ruben Vallés Guerrero | Special Effects Technician |
| Visual Effects | Eloy Cervera | Special Effects Supervisor |
| Crew | Andrés Borcel | Stunts |
| Crew | Martín Cartelle | Stunts |
| Crew | Samuel Icasto | Stunts |
| Crew | Javier Santacruz | Stunts |
| Crew | María Bascary | Video Assist Operator |
| Camera | Eric Bialas | Steadicam Operator |
| Lighting | Raimon Bufí | Gaffer |
| Camera | José Burgos Sologuren | Additional First Assistant Camera |
| Lighting | Nicolás Cabrera | Electrician |
| Camera | Virginia Camino | First Assistant Camera |
| Camera | Héctor Aceituno Cobreros | Camera Trainee |
| Camera | Mark Durdant Hollamby | Dolly Grip |
| Camera | Raphael Lambert | Steadicam Operator |
| Camera | Ángel Martín-Álvarez | Digital Imaging Technician |
| Camera | Álex Mérida | Dolly Grip |
| Costume & Make-Up | Rubén Martín García | Costume Supervisor |
| Production | Nico Sanchez Castro | Location Production Assistant |
| Directing | Julie Collet | Script Supervisor |
| Directing | Elena Moreno-Martet | Script Supervisor |
| Camera | Daniel Sánchez Rubio | Additional First Assistant Camera |
| Camera | Paolo Scirè | Additional First Assistant Camera |
| Camera | José Haro | Set Photographer |
