Charmed: 1x17
That '70s Episode
A powerful warlock 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 when their mother was still alive and they try to prevent the pact.
1 - 1Something Wicca This Way Comes Oct. 07, 1998
1 - 2I've Got You Under My Skin Oct. 14, 1998
1 - 3Thank You for Not Morphing Oct. 21, 1998
1 - 4Dead Man Dating Oct. 28, 1998
1 - 5Dream Sorcerer Nov. 04, 1998
1 - 6The Wedding from Hell Nov. 11, 1998
1 - 7The Fourth Sister Nov. 18, 1998
1 - 8The Truth Is Out There...and It Hurts Nov. 25, 1998
1 - 9The Witch Is Back Dec. 16, 1998
1 - 10Wicca Envy Jan. 13, 1999
1 - 11Feats of Clay Jan. 20, 1999
1 - 12The Wendigo Feb. 03, 1999
1 - 13From Fear to Eternity Feb. 10, 1999
1 - 14Secrets and Guys Feb. 17, 1999
1 - 15Is There A Woogy In The House? Feb. 24, 1999
1 - 16Which Prue Is It, Anyway? Mar. 03, 1999
1 - 17That '70s Episode Apr. 07, 1999
1 - 18When Bad Warlocks Go Good Apr. 28, 1999
1 - 19Out of Sight May. 05, 1999
1 - 20The Power of Two May. 12, 1999
1 - 21Love Hurts May. 19, 1999
1 - 22Déjà Vu All Over Again May. 26, 1999