Hetty Wainthropp Investigates is a genteel British crime–comedy drama television series which aired from 1996 to 1998 on BBC One. The series starred Patricia Routledge as the title character , Derek Benfield as her patient husband Robert, Dominic Monaghan as their lodger Geoffrey Shawcross and John Graham Davies as DCI Adams. Later episodes include Suzanne Maddock as Janet Frazer, a feisty young auto mechanic who sells a car to Geoffrey; their relationship develops by the end of the series. Many of the episodes have been featured on the American PBS series Mystery!. The series is based... on characters from the 1986 novel Missing Persons by David Cook . The incidents in Cook's book were inspired by his own mother's real-life experiences. Before Hetty Wainthropp Investigates, there had been a feature-length pilot episode, entitled Missing Persons, originally broadcast in 1990 on ITV and featuring Tony Melody as Robert Wainthropp. However, ITV opted not to pursue a series.
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