What Christopher Nolan’s The Prestige reveals about his cinematic obsession 20 years on

Before The Dark Knight made him a household name in 2008, Christopher Nolan crafted intricate thrillers such as Following (1998), Memento (2000) and Insomnia (2002). But 2006’s The Prestige, which turns 20 this month, is the most labyrinthine by far.