He also contributed several episodes to prominent British detective programmes such as The Gentle Touch, Hetty Wainthropp Investigates, Bergerac and The Bill.
In 1990, ITV broadcast a feature-length pilot, titled Missing Persons, featuring Tony Melody as Robert Wainthropp; however, ITV opted not to pursue a series.
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Hetty Wainthropp is a retired working-class woman from Darwen in North West England, who has a knack for jumping to conclusions and solving crimes of varying bafflement which often are too minor to concern the police.
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In the United States, the DVD releases were distributed by Acorn Media; the DVD's were released by BBC Home Video in the UK, currently Acorn Media UK, with Madman Films releasing "Hetty Wainthropp" in Australia; in Belgium and the Netherlands distribution was done by Lime-Lights Pictures.
Hetty Wainthropp Investigates | Hetty Naaijkens-Retel Helmrich | Hetty Green | Parker Pyne Investigates | List of NCIS: Los Angeles characters#Henrietta "Hetty" Lange | Hetty Koes Endang | Hetty Feather |
Halsall has been in Coronation Street since November 1998, but had previously appeared in a variety of television shows including Heartbeat, Hetty Wainthropp Investigates and Queer As Folk (1999).
Wharmby had small roles in programmes such as Troy Kennedy Martin's nuclear thriller Edge of Darkness (1985), Brookside (1985), All Creatures Great and Small (1988), A Very British Coup (1988), Agatha Christie's Poirot (1990), Heartbeat (1994) and Hetty Wainthropp Investigates (1996).
She has since appeared in numerous episodes of TV series, including the miniseries Terry and Julian (1992) and Four Fathers (1999), as well as The Bill, Hetty Wainthropp Investigates, Born and Bred, Doctors and Blue Heaven.