Tom Jackman is learning to cope with his alter ego, the dark and mysterious Hyde, who threatens his life and family. They also have to live in the same body while on the run from a mysterious organization that is hunting them.

James Nesbitt, Gina Bellman, Michelle Ryan, Meera Syal, Denis Lawson, Mark Gatiss, Fenella Woolgar, Paterson Joseph, Linda Marlowe, Bruce Mackinnon, Malcolm Storry, Jemma Churchill, David Hounslow, Graham McTavish, Joanna Scanlan