Arthur Lowe

Sue is annoyed when Michael steps in to escort Dick's date to the ballet after he gets tied up with extra duties.

Michael and Paul go for an interview with a doctor who needs two junior partners, but a number of the patients are doubtful of their qualifications.

Sue is not pleased when her father asks Michael to give a sex education talk at the local school, after which he gets a lot of attention.

Michael and Paul decide to update Dr. Maxwell's practice with an ECG machine that doesn't quite perform as it should, and by making Maxwell's study a second surgery.

Paul has the bright idea of using toads in his demonstration for a pregnancy advisory service.