With Elaine away with her boyfriend, Martin finds himself with a new receptionist in the form of her cousin, Pauline who arrives unannounced. He assists his aunt Joan by examining her friend, Muriel Steele. Her son, Danny Steele thinks she is displaying early signs of dementia and wants to put her in a home. Martin's initial examination reveals her to be perfectly normal but he must re-evaluate his diagnosis when she behaves oddly. Martin is also concerned when learns that Danny Steele and Louisa were once quite close and that they are apparently seeing each other again. Finally, he deals with the case of Eddie Rix who has a long history of injuries. He diagnoses any number of possible causes but the truth proves to be something completely unexpected.