Oscar- and Golden Globe-nominated actress Helena Bonham Carter is in talks to join McG's Terminator Salvation, filling a top-secret role described as "small but pivotal." (That's what she said!)

Per the Reporter, exteriors for the fourth installment in the franchise — which chronicles the origin of the humans' battle with SkyNet — are being filmed now in New Mexico, before a possible SAG strike or lockout comes to be. — Matt Mitovich

http://community.tvguide.com/blog-entry/TVGuide-Editors-Blog/Movie-News/Terminator-4-Casting/800042417