Shallacatop was one of the 27 planets stolen by Davros and the New Dalek Empire and placed in the Medusa Cascade. (TV: The Stolen Earth [+]Russell T Davies, Doctor Who series 4 (BBC One, 2008).) It was returned when Donna Noble defeated the Daleks and Davros. (TV: Journey's End [+]Russell T Davies, Doctor Who series 4 (BBC One, 2008).)