Witchstock

Paige tries on a pair of her grandmother's old go-go boots, and finds herself transported back to the 1960's. While there, she meets a younger hippie version of Grams, who is obsessed with ridding the world of evil through the power of love. Piper and Phoebe go back to make sure she doesn't alter the timeline. In the present, Leo, Chris, and the spirit of Grams battle a slime that consumes all magic around it.