Ollie, who asks where he has been. Hanssen gets angry at the idea of Ollie trying to retrain and return to work, and tells him that his brain has been damaged. Hanssen goes into theatre to perform an operation with Meena Chowdhury, Sacha Levy and Dom, while Ollie is taunting him. After surgery, Hanssen shouts at Ollie again. Meanwhile Fletch is refusing to write the proposal for Hanssen. Hanssen and Fletch argue. Hanssen pins him up against the wall all while Ollie is watching. Hanssen bursts into tears and Ollie recollects Jac saying that he should stay and become a Consultant and how he took the bullet. Hanssen goes out on to the main ward and starts crying again and Ollie comforts him. Hanssen goes back to theatre, telling Sacha that he cannot be CEO anymore. Hanssen continues to work at Holby as a consultant surgeon and is replaced as CEO by Abigail Tate, an old friend of Serena's. During this time suspicions are aroused over the ethics of his old friend John Gaskell and his subsequent medical trials. When the truth about Gaskell was exposed Abigail abruptly left and Hanssen assumed the role of CEO once more, but in the fallout of Roxanna's murder and John's death, he began to question whether he was suitable to lead Holby anymore. Casualty In February 2011, Hanssen visits the Emergency Department downstairs (as seen in Casualty), in order to observe the work there. He clashes with Lead Consultant Nick Jordan (Michael French), prompting Hanssen to instate a new Joint Clinical Lead, in the form of Miriam Turner (Cheryl Campbell), Jordan's old mentor. Off-screen, Hanssen promotes Zoe Hanna (Sunetra Sarker) to the emergency department's clinical lead. When he returns to Holby, Hanssen briefly takes charge of the ED while Zoe and Connie are absent. Robyn Miller (Amanda Henderson) and Ethan Hardy (George Rainsford) dislike his presence, especially when he appears suspiciously. Hanssen later sits in on the interviews for a new Band 6 Staff Nurse position in the ED, which Ben "Lofty" Chiltern (Lee Mead) eventually wins, and is present when Lofty is questioned over the accidental death of an agency nurse. Development Henry's casting in Holby City was announced in August 2010. He deemed Hanssen "a bit of a mystery man", sent to the hospital by the Department of Health to make budget cuts. Executive producer Belinda Campbell commented that Henry was