I watched this as part of the BBC3 Pilot Episodes series, so I assume it is potentially going to be a series. An excellent horror/drama set in a hospital where strange things are going on and evidence of research malpractice. For the non-medical among you, wakening during surgery as shown here is extremely rare (I am a retired anaesthetist), although for some reason films and TV like to exaggerate. It is not made clear exactly what has been done to the patients, but hopefully that would be resolved with a series. Tension is maintained very well without resorting to extensive use of CGI. I just hope it doesn't become just another Zombie type program if made into a series. Claire Foy is excellent, and Emily Beecham (Stella) who is not credited in the cast list here also acquits herself well. Recommended viewing.