Factual error: The police car used in this programme, which is set in the early 1960s, is an Austin 1100 Mark 2. However, the Austin 1100 Mark 2 did not start production until 1967.
Dial Margaret for Murder - S2-E4
Factual error: In Series 2 Episode 4 (Dial Margaret for Murder), Allison listens to Dick Frank's heart. She has her stethoscope in her ears backwards. As a physician, she would never do that.