Episode 94 of "Sabrina, the teenage witch"
s04e19 The Wild, Wild Witch
Title: The Wild, Wild Witch
Original Air Date: 03/31/2000 on ABC
Plot Outline:
Sabrina resents living by the rules when she is grounded for breaking curfew, so a magic prospector zaps her to the Wild West, where, as the new sheriff, she happily declares a formerly rule-ridden town rule-less.
