<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> <P> When Leo returned, Phoebe discovered him levitating to change a light bulb and he confessed the truth to her . He also told her that as much as he loved Piper, he did not think their relationship could continue; witches and Whitelighters are not meant to be together . He was later shot by a Darklighter's poison arrow while attempting to protect one of his charges . He went to the manor for aid, where Prue and Piper learned he was a Whitelighter . Piper used a spell to switch powers with Leo, so she could heal him . Piper then confessed she still loved him, but unfortunately Leo is still unconscious due to the poisoned arrow . Leo's "trigger" to make the healing power work was love, and because of Pipers confession, he was healed . Leo offered to give up being a Whitelighter to be with Piper, but she did not want him to turn away from his calling . </P> <P> Piper went to the future with Phoebe and Prue, and learned that she and Leo were divorced, and they had a daughter named Melinda Halliwell . Although Piper still loved Leo, she also wanted a normal romance . Feeling Leo could not provide that, she started a romance with her new neighbor, Dan Gordon . </P>

What episode does leo tell piper he is a whitelighter
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