P.D. James: Death in Holy Orders – 2003 – Detective Adam Dalgliesh looks into an old murder case at Saint Anselm's, and another murder occurs while he's there.
P.D. James: The Murder Room – 2004 – When a man is killed in a manner that mirrors an exhibit in his family's museum, Detective Adam Dalgliesh investigates.
Paranoid – 2016 – A playground murder with witnesses takes detectives into a dark mystery that sends them across Europe in search of the killer.
Partners in Crime – 2015 – Jessica Raine and David Walliams star as Tommy and Tuppence, solving mysteries in 1950s Britain.
Partners in Crime – 1983 to 1984 – Francesca Annis and James Warwick star in this take on Agatha Christie's Tommy & Tuppence mysteries.
Paula – 2017 to present – A chance hookup turns a woman's life upside down.
Penny Dreadful – 2014 to 2016 – A group of explorers and adventurers team up to fight supernatural threats in Victorian England.
Picnic at Hanging Rock – 2018 – Australia – On Valentine's Day 1900, three schoolgirls and their governess go missing.
Pie in the Sky – 1994 to 1997 – When DI Crabbe leaves the police force to open a restaurant, they continue to pull him back in for part-time crime-solving.
Pine Gap – 2018 to present – Australia – This spy thriller takes place at a joint US/Australian defence facility in Australia.
Place of Execution – 2009 – 45 years after a young girl disappears from an English village, a journalist attempts to make a documentary on the subject and causes more trouble than intended.
Prey – 2014 to 2015 – Manchester Detective Marcus Farrow (John Simm of Life on Mars) is accused of a crime he didn't commit, sending him on the run as he tries to prove his innocence.
Prime Suspect – 1991 to 2006 – Helen Mirren stars as Detective Jane Tennison, battling crime as well as sexism on the job.
Prime Suspect 1973 – 2017 – This Prime Suspect prequel explores the beginning of Jane Tennison's career as a police officer, along with her first murder case.
Primeval – 2007 to 2011 – Prehistoric creatures begin to appear in England, so Professor Cutter and his team are dispatched to capture them.
Prisoners' Wives – 2012 – Gemma thinks she has a perfect life until her husband is arrested for murder.
Proof – 2004 to 2005 – When an investigative reporter discovers a connection between two crimes, he unearths much more than expected.
Public Enemies – 2012 – Anna Friel (Marcella) stars in this series about a probation officer helping a convicted murderer adjust to life back on the outside.
Quatermass – 1979 – This science fiction series shows us a broken-down civilization where an alien power appears to be influencing the young.
Quirke – 2013 to 2014 – Gabe Byrne plays a pathologist in 1950s Dublin.
Raffles – 1975 to 1977 – In Edwardian England, A.J. Raffles is a gentleman of leisure, but he's also an accomplished safecracker and jewel thief.
Randall & Hopkirk (Deceased) – 1969 to 1970 – Two private detectives, one living and one dead, work together to figure out who killed Hopkirk.
Randall & Hopkirk (Deceased) – 2000 to 2001 – Two detectives solve mysteries, but one of them is a ghost.
Rebus – 2000 to 2004 – Based on the novels of Scottish author Ian Rankin, Inspector Rebus is an old-fashioned detective in every sense of the word. He smokes, drinks, and doesn’t have a lot of luck with his personal life.
Reilly: Ace of Spies – 1983 – Sam Neill plays Sidney Reilly, the legendary British spy who inspired James Bond.
Rellik – 2017 to present – DCI Markham and his team hunt down a killer in this mystery told in reverse.
Remember Me – 2014 – A man moves into a retirement facility and promptly becomes sole witness to a murder.
Republic of Doyle – 2010 to 2014 – Canada – Jake and Malachy Doyle run a questionable private investigations firm in Newfoundland.
Requiem – 2018 to present – More than 20 years after a child disappears in Wales, a seemingly unrelated suicide draws a young woman back to the village where it happened.
Residue – 2015 to present – Journalist Jennifer Preston seeks the truth in a futuristic English city, often finding paranormal answers.
Rillington Place – 2016 – This miniseries tells the story of serial killer John Christie, a man who killed at least seven women in the 40s and 50s.
Ripper Street – 2012 to 2017 – DI Reid and his team police the streets of Whitechapel where Jack the Ripper once roamed.
River – 2015 – River is a brilliant but haunted detective.
Riviera – 2017 to present – An American woman finds herself mixed up in a world of lies and crime when she attempts to find out the truth about her husband's death.
Rockliffe's Babies aka Rockliffe’s Folly – 1987 to 1988 – A tough, old-school detective is charged with seven CID trainees.
Rose & Maloney – 2002 to 2005 – Sarah Lancashire (Happy Valley) stars as a woman who works at the Criminal Justice Review Agency, fighting miscarriages of justice.
Rosemary & Thyme – 2003 to 2008 – Former policewoman Laura and a horticulture professor Rosemary are brought together by a love of gardening, but murder seems to follow them.
Rough Diamond aka Diamond Geezer – 2005 to 2007 – David Jason (A Touch of Frost) stars as a professional jewel thief using his abilities to help Scotland Yard.
Rules of Engagement – 1989 – Murder and intrigue flourish when the town of Portsmouth is sealed off during WWIII.
Ruth Rendell Mysteries – 1987 to 2000 – While initial seasons of this anthology series focused on Rendell's CI Reg Wexford, later seasons merely focused on including elements of her stories.