 Trouble comes to San Fransico in a package of a Siren. First killing the husband of Leo s charge, a future Whitelighter, then centering on Cole, hurting Pheobe in the process. After Paige quits her job as a social worker, bringing on Wicca full-time, she realizes the good she did as social worker, and the good in her as part Whitelighter. Piper s pregnancy symptoms grow more strange and the unborn baby switch s Leo and Piper s persona s.