The fourth series of the British medical soap opera Doctors originally aired between 2 September 2002 and 13 June 2003.
An increase in episode output saw an increase in the core cast, with six regulars cast for the series: Laurence Penry-Jones, Ela Kay, Stirling Gallacher, Diane Keen, Seán Gleeson and Ben Jones.
The introductions began with flatmates Oliver Berg (Laurence Penry-Jones), a doctor, and Carolina Shaw (Ela Kay), a receptionist.
[4] Diane Keen then joined as Julia Parsons, the ex-wife of Mac McGuire (Christopher Timothy).
She was asked to join on an initial three-month stint and accepted due to having worked with Timothy before.