Jim Sonzero is the director of the 2006 remake horror Pulse. In 2009 he was the creative director of cinematics for Resident Evil 5. He wrote and directed War of the Angels, a 1999 drama staring Matthew Carey as a Nazi radio star who struggles with his patriotism and morals during the imminent fall of Nazi Germany. In addition to films, Sonzero directed the music video "Can't Let Go" by Mariah Carey.

Kairo is a Japanese horror film that is based on the novel of the same name by Kiyoshi Kurosawa, who also directed the film. The film was released in 2001 and since has collected a cult following. Pulse is the American re-make of this film, and although there are some minor changes in the plot, the idea for both films is essentially the same.
Kairo seems to have a few more details than Pulse as to what the ghosts are, spirits somehow spilling out of the afterlife because it is full, and using the internet to do so, but overall it is similarly vague as to how, and why they then kill the living.

Samm Levine plays Tim in the 2006 horror film Pulse. He is best known for his role as Neal on the excellent but short lived television series Freaks and Geeks on NBC. Since Freaks and Geeks, Samm Levine has made appearances in Spin City, Boston Public, Yes Dear, Undeclared, The Drew Carey Show, That's So Raven, That '70s Show, How I Met Your Mother, My Name Is Earl, Entourage, and Family Guy. He also played a small role along side his Pulse co-star Kirsten Bell in Veronica Mars.

Rick Gonzalez appears in Pulse, the 2006 thriller as the character Stone, who is friends with the main character Mattie, played by Kristin Stewart. Gonzalez first started acting when he was young, taking part in every school play he could. His first role was as Sanchez in the small made for TV movie, Thicker Than Blood. His first on screen role was as Ricky in the movie Mambo Cafe and later participated in the film Prince of Central Park.


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