A Witch in Time

When Phoebe gets a premonition that her new boyfriend Miles will die at the hands of a demon, she takes it upon herself to be his bodyguard around the clock. However, she becomes disheartened that she continually gets that same premonition several more times. As a result, she inadvertently opens a portal where a demon from the future gets in contact with Cole, who tries to stop Phoebe from getting in the way of Miles' destiny.