CSI: Maggie - S1.E4

The Ghostfacers have found the screen test of Janet Myers, the woman who's been hunting the theatre, and think she might still be hanging around the theatre because she's waiting for her big break. Meanwhile Maggie is looking into the footage and finds out that Janet is visible in the reflection of the mirror, but when you turn around you can't see her anymore. Ed concludes that they need loads of mirrors in order for them to face her.