The Key to Reserva is a 2007 short film or long-form advertisement for Freixenet Cava champagne starring, written and directed by Martin Scorsese.

The film, which contains no dialogue, shows Roger Thornberry (Simon Baker) arriving at a box seat during an orchestra performance.

He is noticed by one of the performers, Leonard, who signals to his accomplice Louis Bernard (Michael Stuhlbarg), who is holding Roger's wife Grace hostage in the audience.

Roger uses the key to open a locked case which contains a bottle of Freixenet with top secret files hidden inside.

The camera pans back to reveal Scorsese, Thelma Schoonmaker, and the interviewer in an office in a tower block, meanwhile crows flock around the building.