Castro served as an expert crises counselor specializing in suicide prevention for seven years. He was also an officer in the United States Navy, twice recalled to active duty after 9/11, then returning to his career as a writer. While a student at the UCLA School of Theater, Film, and Television he was a finalist for the Coca-Cola Refreshing Filmmaker's Award for directing and producing his original screenplay Healing, and landed a three picture screenwriting deal worth $1 million.
An original screenplay of Castro's was made into August Rush, for which he received a story credit with Nick Castle. The screenplay was credited to Castle and James V. Hart (who had previously worked on Steven Spielberg's Hook). The romantic musical drama, with music by Mark Mancina, was released November 21, 2007 by Warner Bros. The film is directed by Oscar-nominee Kirsten Sheridan, and stars Freddie Highmore, Keri Russell, Jonathan Rhys Meyers, Terrence Howard and Robin Williams.
August Rush gorssed $65.3 million, and received mixed to negative reviews from film critics. In a review by USA Today, Claudia Puig commented that "August Rush will not be for everyone, but it works if you surrender to its lilting and unabashedly sentimental tale of evocative music and visual poetry." The Hollywood Reporter reviewed the film positively, writing "the story is about musicians and how music connects people, so the movie's score and songs, created by composers Mark Mancina and Hans Zimmer, give poetic whimsy to an implausible tale."
|2007||August Rush||Story by||with Nick Castle and James V. Hart.|
|2009||Dixon's Girl||Story by||Short film|
|2018||Speed Kills||with David Aaron Cohen and John Luessenhop.|
- Rolfe, Pamela (2007-05-20). "Ranvaud's Buena Onda". The Hollywood Reporter. Nielsen Business Media. Retrieved 2007-11-18.[dead link]
- Lyons, Charles (2007-03-07). "Castro inks three-pic deal with Digital Mercury". Variety. Reed Business Information. Retrieved 2007-11-18.
- "Columbia Records Announces the Release of 'August Rush - Music From The Motion Picture'" (Press release). Columbia Records. 2007-11-14. Retrieved 2007-11-18.
- "August Rush — Rotten Tomatoes". Rotten Tomatoes. Archived from the original on 24 November 2007. Retrieved 2007-11-27.
- Puig, Claudia (2007-11-23). "Lilting 'August Rush' is poetry in emotion". USA Today. Retrieved 2008-02-29.
- Honeycutt, Kirk (November 8, 2007). "August Rush". The Hollywood Reporter. Archived from the original on 2008-05-06. Retrieved 2008-02-29.