The Hollow

The Hollow is a fictional entity created by Brad Kern for the American television series, Charmed. It first appears in the fourth season of the supernatural drama and is used again in the last two episodes of the series in its eighth season. It is an essence that can possess any living being, and when it was allowed to take on a corporeal form, it was portrayed by Julian McMahon, Holly Marie Combs, Alyssa Milano, Rose McGowan, Kaley Cuoco, Marne Patterson, Lawrence Smilgys, and Robert Madrid