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This post was inspired by a discussion on “The Inspector Morse, Lewis And Endeavour Appreciation Society” Facebook group. A picture of Cheryl Campbell was posted because she had appeared on both Morse and Lewis. However, it quickly became clear from the comments that she appeared in many more mystery series. So I took it upon myself to do some research and find out just how many mystery series she was actually in. Below is a list of them, with some information about her appearances. I also include pictures from the show if I could find them.
1970s
Killers
Played Miss Duncan in a 1976 episode titled “The Crumbles Murder”. The series was about dramatizing real-life murders, but there’s otherwise not much info about the show. The episode that Cheryl appeared in was a dramatic retelling of the murder of Emily Kaye in 1924 [source].
Z-Cars
Z-Cars was a police procedural drama that ran from 1962 to 1978, but many episodes have been lost. Cheryl Campbell appeared in two episodes playing different characters: once in 1971, and once in 1977. Interestingly, John Thaw (a.k.a. Morse) also appeared on the show, playing a recurring detective character in 4 episodes of season 3.
Crown Court
Played a minor character in an episode in 1978. This was a courtroom drama that ran from 1972 to 1984. It presented a case over a series of three episodes, and at the end of the third episode a jury of “ordinary people” comes to a verdict on the evidence presented on the show. If you’re in the US, there are a few episodes of Crown Court available to stream on Amazon Prime.

The Sweeney
Played Erica Taylor in a 1978 episode titled “Feet of Clay”. The show was a police drama starring John Thaw (a.k.a. Morse). The Sweeney is available to stream on Amazon Prime with a BritBox subscription. It’s also available on DVD.
Malice Aforethought
A 1979 miniseries based on a 1931 novel of the same name by Anthony Berkeley Cox. It is an inverted detective story, also known as a “howcatchem” (similar to Columbo), because we know who the murderer is from the start, and the question is whether or not he gets caught. Cheryl played Madeleine Cranmere, the killer’s mistress.
1980s and early 1990s
The 1980s and 1990s saw Cheryl play some major characters in mystery adaptations.

The Seven Dials Mystery
A 1981 adaptation of the Agatha Christie novel. Cheryl plays Lady Eileen ‘Bundle’ Brent, one of the sleuths. The Seven Dials Mystery is available to stream through BritBox and through Amazon Prime Video.

Miss Marple: The Murder at the Vicarage
A 1986 adaptation of Agatha Christie’s novel adaptation of the first Marple novel. Cheryl, plays Griselda Clement, the vicar’s wife and a possible suspect. This episode was the first episode of season 2 of Miss Marple and is available to stream through BritBox.
Centrepoint
This was a 1990 miniseries about a young man who is reunited with his father. The father has been presumed dead for ten years, and his son then tries to unravel the truth behind his disappearance. Cheryl plays a character called Maria Wearing.

Inspector Morse
Played Sylvie Maxton in the 1990 episode: “The Infernal Serpent”. This was the first episode of Season 4 of Morse, and it’s available to stream through BritBox.

The Casebook of Sherlock Holmes
Played Lady Frances Carfax in the 1991 episode: “The Disappearance of Lady Frances Carfax”. This was the first episode of Season 3 of The Casebook of Sherlock Holmes, and it’s available to stream through BritBox.
Ruth Rendell Mysteries
Played Corinne Last in the 1991 episode: “Means of Evil”. While, as far as I can tell, this particular episode is not available–other episodes of the Ruth Rendell Mysteries are available to stream through Amazon Prime.

Maigret
Played Aline Bauche in the 1992 episode: “The Patience of Maigret”. This was the first episode of the first season of Maigret, and it can be streamed through BritBox.
1999 onwards
Most recently, Cheryl continues to play in classic detective series, but also appears in more modern mysteries/thrillers.
A Touch of Frost
Played Diana Grey in the 1999 episode: “Appendix Man”.

Midsomer Murders
Played Sandra MacKillop in the 2000 episode: “Beyond the Grave”.

Foyle’s War
Played Emily Gascoigne in the 2002 episode: “A Lesson in Murder”.
Waking the Dead
Played Maureen Hunt in the 2005 Episode: “Undertow”. Waking the Dead is a police procedural crime drama series featuring a fictional Cold Case unit comprising CID police officers, a psychological profiler and a forensic scientist.
Funland
A 2005 series about a man who arrives in Blackpool to investigate the death of his mother. Cheryl played Valerie Hinchcliffe in 6 of the 11 episodes.
Dalziel and Pascoe
Played Jean Swainbank in the 2006 episode: “Fallen Angel”.
Spooks
Played Deputy Prime Minister in a 2006 episode. Spooks is about MI-5 agents, and so it’s more of a spy show than a mystery.

Lewis
Played Valli Helm in the 2008 Episode: “Music to Die For”.

Agatha Christie’s Poirot
Played Lady Boynton, the victim, in the 2008 Episode: “Appointment with Death”.
Midsomer Murders
Cheryl made a second appearance on the show in the 2013 episode, “The Sicilian Defense”, where she played Vivian Stannington.

Doctor Foster
Since 2015, Cheryl had a recurring role on the show as Helen Foster, the main character’s mother-in-law.
Honourable mentions:
Aside from mystery series, I was surprised to find the following among Cheryl Cambell’s credits:
Monsignor Renard
A 2000 mini-series starring John Thaw (a.k.a. Morse) as the titular character, a priest who comes back to his French home town during World War II and gets involved in the resistance movement.
The Way We Live Now
A 2001 mini-series adaptation of an Anthony Trollope book of the same name. The series takes place in the 1870s and stars David Suchet (a.k.a. Poirot) a financier with a mysterious past.
Wonderful actress – I hadn’t realized just how many mystery adaptations and shows she had featured in!
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I was really surprised too! There are a couple series on here that I haven’t watched yet, and I feel like if anyone is looking for a new mystery show to watch they should just check her credits 😛
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