ITV's new crime drama, Six Four, is based on Hideo Yokoyama's best-selling novel and follows police officer Chris O'Neill and his wife Michelle as they deal with their daughter's disappearance. Chris is also faced with another missing persons case that uncovers corruption and errors. The cast includes Kevin McKidd, Vinette Robinson, Richard Coyle, James Cosmo, Alex Ferns, Brian McCardie, and Lorne Macfayden. The series promises to be a gripping watch.