The Dead Zone (2002)

Johnny Smith is a high school teacher in love with Sarah Bracknell, a music teacher at the same school. But Johnny is smashed up in a horrendous car accident and slips into a coma that lasts for six years. When he awakens, Sarah has married another man, while his once-latent psychic powers come to flower. He now has visions that reveal things from both the past and the future. And this puts him in the path of a serial killer.