Answer
The answer is three. Tom Hardy has collaborated with Christopher Nolan in three of his films: "Inception" (2010), "The Dark Knight Rises" (2012), and "Dunkirk" (2017). In "Inception," Hardy played the role of Eames, a skilled impersonator and member of Dom Cobb's (Leonardo DiCaprio) team. In "The Dark Knight Rises," he portrayed Bane, a ruthless terrorist who becomes a major adversary for Batman (Christian Bale).