Peckforton Castle is a Victorian country house built in the style of a medieval castle. It stands in woodland at the north end of Peckforton Hills one mile (2 km) northwest of the village of Peckforton, Cheshire, England. It is recorded in the National Heritage List for England as a designated Grade I listed building. The house was built in the middle of the 19th century as a family home for John Tollemache, a wealthy Cheshire landowner, estate manager, and Member of Parliament. It was designed by Anthony Salvin in the Gothic style. During the Second World War it was used as a hostel for physically disabled children.

The Time Warrior is the first serial of the 11th season of the British science fiction television series Doctor Who, which was first broadcast in four weekly parts on BBC1 from 15 December 1973 to 5 January 1974. The serial introduced Elisabeth Sladen as new companion Sarah Jane Smith. It also marked the debut of the Sontaran race. The serial also introduces the name of the Doctor's home planet, Gallifrey.