Academy Award-nominated actress Helena Bonham Carter is in talks to join the cast of the latest installment of the Terminator saga, Terminator Salvation, according to The Hollywood Reporter. Salvation already boasts an impressive cast led by Christian Bale which features Bryce Dallas Howard, Common and Sam Worthington. The film is being directed by McG (We Are Marshall, Charlie's Angels) with a release planned for May 2009. Bonham Cater will be appearing later this fall in Harry Potter and the Half-Blood Prince.