While he successfully gains the Charmed Ones' trust, Leo remains initially suspicious.
In season six, Chris reveals that he is actually Leo and Piper's son and that he traveled back in time to prevent his older brother Wyatt (Jason and Kristopher Simmons) from growing up to be the evil dictator he becomes in the future.
In order to help ease Dan's mind, Piper wishes for the genie to make him forget about learning the truth and for him to truly move on with his life, which leads to Dan moving to Portland to take a job offer.
However, in season five Cole escapes The Wasteland, due to him stealing vast amounts of powers off other dead demons, and forces himself into the sisters' lives again.
After Doherty departed from the series in 2001, resulting in her character's death, she was replaced by Rose Mc Gowan as the long-lost younger half-sister Paige Matthews from the fourth season onwards.
The following list only contains characters that appeared in five or more episodes.
In order for this to happen, Chris set up a scheme where most of The Elders would die so that Leo could become an Elder and he could become the Charmed Ones' new whitelighter, allowing him to get close enough to Wyatt to protect him.