• Castell Coch, Tongwynlais, South Glamorgan, Wales, UK (exteriors: Cackles Academy)

  • Loseley Park, Guildford, Surrey, England, UK (season 3)

  • Montréal, Québec, Canada

  • Twickenham Film Studios, St Margarets, Twickenham, Middlesex, England, UK (studio)