Blinded by the Whitelighter - S3-E11
Continuity mistake: When Phoebe is looking in the Book of Shadows for information about Eames, she comes across the Belthazor page, and lays the page down flat. In the following shots, the page moves to her hand, then lying down flat, then to her hand again. (00:19:10)





Chosen answer: Her agent/manager negotiated a special billing as part of her contract. It distinguishes her from the rest of the cast, probably when she became a producer on the show.
JC Fernandez