In 2009 he directed Diagnosis: Death, a feature film starring Jemaine Clement, Bret McKenzie and Rhys Darby (of Flight of the Conchords fame).
In 2007, Castillo was signed as the Spanish voice of Bret McKenzie in HBO television series Flight of the Conchords, as well to co-writing the Spanish lyrics working with songwriter Claudia Castillo and sound Engineer "Waldo Valenzuela".
Bret Harte | Bret Maverick | Bret Easton Ellis | Baker & McKenzie | Bret Hart | McKenzie Westmore | Bret Michaels | Bret Boone | Reggie McKenzie (linebacker) | Reggie McKenzie | Julia McKenzie | Bret McKenzie | Scott McKenzie | Raleigh McKenzie | McKenzie Bridge, Oregon | McKenzie Bridge | Graham McKenzie | Fred McKenzie | Duke McKenzie | Clinton McKenzie | Bret Schundler | Bret Harte, California | Bret Gilliam | Bret Blevins | Bret Bielema | Barry McKenzie Holds His Own | Sally McKenzie | Rock of Love with Bret Michaels | McKenzie, Maryland | Matt McKenzie |