Javier Grillo-Marxuach

 is a television producer born in San Juan, Puerto Rico on October 28th, 1969. He is best known for his work on the WB Network television series Charmed, beginning with season two. In 1997, Javier wrote the screenplay for a television special called Van Helsing Chronicles. Javier also worked as co-executive producer on the TV series Medium starring Patricia Arquette. Arquette's character was clairvoyant and used her second sight to aid the police in either averting catastrophes or solving crime.