Christopher Perry Halliwell (played by Drew Fuller ) is the second eldest son of Leo (Brian Krause) and Piper (Holly Marie Combs), making him a half-witch and half-whitelighter. Chris is introduced into the season five finale as a whitelighter from the future who helps assist the sisters against magical beings known as The Titans . 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 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. In the season six finale, adult Chris is killed by an Elder named Gideon (Gildart Jackson) and baby Chris is born.