Complete story — includes the ending
In his twisted attempt to win Phoebe back, Cole casts a spell that alters reality, which eliminates Paige as a Halliwell and destroys the Power of Three. Paige suddenly finds that her sisters have no knowledge of her existence and that past villains are still alive, meaning all the innocents they saved are dead. Paige recreates the Power of Three and regains her powers. Using them, she retrieves the vanquishing potion she made to kill the vulnerable Cole and prepares to finally kill him, but is stopped by Phoebe. Cole does not try to escape, thinking Phoebe loves him too much to kill him, but Phoebe throws the potion herself, finally killing Cole. Cole's death reverts the world to normal and only Paige remembers what happened.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, Charmed season 5. HTML formatting and reference markers removed. · Content license