17. That '70s Episode

After Prue, Piper, and Phoebe cross paths with a Warlock named Nicholas, they discover that he is intent on obtaining their powers by any means necessary. When they discover that he's immune to their powers thanks to an agreement with their mother, they cast a spell to go back in time to the day the deal was made, hoping to stop their mother from going through with it.

Plot summary and ending

Spoilers ahead. Coverage follows the scope labeled below.

Complete story — includes the ending

A powerful warlock, Nicholas, shows up claiming that he made a pact with the sisters' mother in which he spared her life in exchange for the girls' powers. Fleeing him, the three sisters go back in time to the 1970s before Phoebe was born, when their mother was still alive and they try to prevent the pact. They manage to get Patty to break the pact and return to the future where he is no longer immune to their respective abilities and vanquish him with a very strong spell left for such a purpose by their late grandmother.

Sources and content license

Source and revision history · Adapted from Wikipedia contributors, Charmed season 1. HTML formatting and reference markers removed. · Content license