Banfield was hired in 2008 to become the permanent Chief of the Emergency Department, replacing Dr.
Skye Wexler who was serving as acting chief. The board had decided to offer the permanent position to Dr.
Gregory Pratt, but with Pratt's death, Banfield was brought in as his replacement. She first appeared in the second episode of Season 15 and immediately puts the whole ER on edge with her tough attitude. It was mentioned that she flew to Indonesia to help that country deal with the
2004 tsunami disaster. On her first day, Nurse Haleh mentioned Banfield looked familiar as if she's been at County before, which Banfield immediately denies. Her first day as Chief tested her skills as an able and efficient leader when a bio-terrorist released a bag of weaponized Ricin in the ER, necessitating an evacuation and quarantine. She briefly met and clashed over a gunshot case with
Abby Lockhart, who was finishing her last shift on her last day at County General. Nonetheless, Banfield made amends with her new acquaintance before Abby departed for Boston. In the episode "Heal Thyself", the treatment of a little girl who almost drowned in the Chicago River triggered painful memories, yet in the end it helped Banfield figure out how to save the girl from a certain death, thereby in her mind redeeming herself from the mistakes she made with her son Darryl. Later in Season 15, Cate and
Archie Morris get snowed in at a conference in Omaha. Banfield ends up getting drunk and makes a wild scene of entertainment in the hotel lobby. She smiles and actually laughs for the first time (probably the first time since before the accident). The two end up having to share a room together before flying back to Chicago. Cate begins to open up more to Morris how she and her husband tried to have another baby a few years back but miscarried. == Prior to County ==