The letter 'Z' and a decade of movies:

Zatoichi – Takeshi Kitano, 2003, Japan
Zift – Javor Gardev, 2008, Bulgaria
Zizek – Astra Taylor, 2005, USA/Canada
Zodiac – David Fincher, 2007, USA
La Zona – Rodrigo Pla, 2007, Spain/Mexico