<P> Leo was married to a woman named Lillian in his mortal life and when he died, he appeared to her in a dream and encouraged her to move on with her life . Like all whitelighters, Leo is a pacifist, disallowed by the Elders to kill . Leo has watched over many of his charges; those who were future Whitelighters and good witches . </P> <P> In the late 1960s, Leo befriended Penny and Allen Halliwell, the grandparents of the Charmed Ones . </P> <P> Shortly after the Charmed Ones discovered their powers, Leo, posing as a handyman, was hired to fix up their house . Since he was not supposed to reveal himself as their Whitelighter, he used this as an opportunity to keep watch on them Piper and Phoebe became attracted to him . As Leo worked on their house, Piper and Phoebe competed for his attention, though his feelings were reciprocated with Piper . </P> <P> When the warlock Rex Buckland tricked the Charmed Ones into giving up their powers, Leo "healed" the Book of Shadows and restored them . Shortly afterward, Leo had to leave town and take another charge, but he watched over and guided the Charmed Ones on many occasions . </P>

When does leo become the charmed ones whitelighter
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