Sam I Am - S5-E9

Corrected entry: In this episode Paige is assigned Sam, her father and Patty Halliwell's former whitelighter, as a charge but in the episode P3 H20 we find out that Sam clipped his wings - "Piper: Sam was mum's whitelighter?" "Leo: Emphasis on was. When your mom died, Sam clipped his wings. He's mortal now, but once, yeah he was a whitelighter. He looked after your mother"

Correction: He states in this episode that after he died for the second time after being made mortal, the elders made him a whitelighter again.