Out of Sight

When Prue tries to stop a kidnapping in the park, a reporter sees her using her powers. Phoebe and Piper attempt to learn more about the demons who stole the child, which turn out to be grimlocks, demons which sense people's auras and steal children's eyesight. At the same time, they must try to stop the reporter from exposing Prue. The sisters are not exposed, but Andy does find out about their powers.