Robert Redford is a signature away from starring in The Castle, critic-turned-filmmaker Rod Lurie's follow-up to The Contender, Variety reports. Redford would play a five-star general who is convicted of a capital crime and sent to the military's only maximum security prison (aka The Castle). Once there, he turns the inmates into his own personal 1,200-man army and threatens to take the prison by storm. Mark Wahlberg is in talks to co-star.