Dr. Brendan "Mac" McGuire is a fictional character from the BBC soap opera Doctors, portrayed by Christopher Timothy. Series creator Mal Young introduced Mac as one of the nine original regular characters on the soap. He works as a general practitioner and surgery partner at the fictional Riverside Medical Centre and is depicted as an old-fashioned, headstrong and respected doctor who is unafraid to speak his thoughts. Timothy remained in the role until 2006.

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