Airs Tuesday, Nov 1 2011 at 20:00 GMT on BBC One
Michael returns to try and clear his name and win back the trust of his colleagues.
He and Ric lock horns over a patient in need of Michael's particular area of expertise…
Elsewhere, Jac tries to distance herself from the plastics fiasco and kick-start her career with a new research project, but she needs Ollie's help. Meanwhile, Ollie discovers some disturbing information about his mentor.
Also today, Greg and Sahira's relationship takes a new turn, while Chrissie is forced to be honest with Dan when he pushes her to make decisions about their wedding.