 This was shot on location at Heythrop Zoo, a private zoo in Chipping Norton run by Jim Clubb, whose firm Amazing Animals specialises in training animals for cinema and television.The Norman Foster-designed building in Chertsey, Surrey, which then housed the European Headquarters of video game designer and publisher Electronic Arts, was used as The Klein & Utterson Institute.A large country estate near Henley-on-Thames and in Bognor Regis was used for some of the scenes whilst on the run and in flashbacks.