Hobart State Penitentiary is where Phoebe Halliwell was imprisoned after she killed a mortal named Cal Greene and was exposed as a witch by Nathaniel Pratt in an alternate 2009. After Phoebe received a premonition, the sisters traveled to the future to find out what had happened. Phoebe was sentenced to be burned at the stake in the penitentiary, though her sisters had come up with a plan to rescue her. However, Phoebe stopped them as she realized she needed to face the consequences of her actions. As she burned, the sisters were returned to their own time.