| 1. | Death on Paper | 55 | |
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| 2. | Rediscovering Miss Marple | 79 | |
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| 3. | Notable Trials | 50 | |
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| 4. | The Poisoned Chocolates Case by Anthony Berkeley | Green Penguin Book Club, Episode 5 | 35 | |
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| 5. | On Gaudy Night by Dorothy L Sayers | 120 | |
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| 6. | The Collectors | 47 | |
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| 7. | The Murder Mystery Hotline II | 54 | |
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| 8. | The Missing Moneylender by W. Stanley Sykes | Green Penguin Book Club, Episode 7 | 47 | |
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| 9. | Vanishing Corpses | 63 | |
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| 10. | The Box of Delights | 44 | |
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| 11. | On The Thames | 53 | |
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| 12. | Edmund Crispin's Inside Jokes | 56 | |
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| 13. | The Red Barn Murder | 35 | |
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| 14. | The Crimes of Dorothy Erskine Muir | 61 | |
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| 15. | Agatha Christie’s Taste in Crime Fiction | 75 | |
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| 16. | Dining with Death | 55 | |
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| 17. | The Cluefinder | 12 | |
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| 18. | Mysterious Knitting | 65 | |
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| 19. | Teaching Sleuthing | 52 | |
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| 20. | Ranking Christianna Brand | 44 | |
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| 21. | The Four Just Men by Edgar Wallace | Green Penguin Book Club, Episode 9 | 47 | |
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| 22. | Pseudonyms | 51 | |
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| 23. | In The Dentist's Chair | 46 | |
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| 24. | The True Crime Case of Nurse Daniels | 47 | |
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| 25. | The Other Detectives | 63 | |
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| 26. | The Mysterious Affair at Styles by Agatha Christie | Green Penguin Book Club, Episode 6 | 56 | |
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| 27. | The Man in the Dark by John Ferguson | Green Penguin Book Club, Episode 10 | 34 | |
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| 28. | The Psychology Of Anthony Berkeley | 59 | |
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| 29. | Mr Fortune, Please by HC Bailey | Green Penguin Book Club, Episode 4 | 30 | |
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| 30. | Bedside Manner | 59 | |
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| 31. | Whodunnit Centenary: 1925 | 71 | |
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| 32. | Oxford vs Cambridge | 73 | |
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| 33. | Father Christmas | 50 | |
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| 34. | The Poison Book | 63 | |
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| 35. | Competent Women | 73 | |
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| 36. | Cui Bono? | 50 | |
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| 37. | Crime at Christmas | 64 | |
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| 38. | An Inspector Calls | 53 | |
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| 39. | The Mystery Short Story | 61 | |
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| 40. | Instrument of Death | 35 | |
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| 41. | Enter The Watson | 72 | |
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| 42. | Murder at the Bookshop | 65 | |
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| 43. | Round Robin | 55 | |
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| 44. | Raffles by E.W. Hornung | Green Penguin Book Club, Episode 8 | 34 | |
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| 45. | Notes and Queries | 49 | |
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| 46. | All At Sea | 46 | |
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| 47. | The Queen of True Crime | 0 | Show |
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| 48. | Surplus Women | 0 | Show |
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| 49. | Looking East | 0 | Show |
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| 50. | #mysterybooks #mystery #crimefiction | 2 | |
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| 51. | The Christie Completists | 19 | Show |
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| 52. | Agatha Christie's Surprising Move Beyond the Golden Age of Detective Fiction | 4 | |
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| 53. | Why *are* there so many golf murder mysteries? | 6 | |
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| 54. | How did this mystery writer disappear from history? | 7 | |
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| 55. | Agatha Christie: The Dispenser | 23 | Show |
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| 56. | The Secret Society Behind Our Favourite Novels | 8 | |
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| 57. | At Home With Shedunnit | 10 | Show |
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| 58. | The Whodunnit in India | 13 | Show |
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| 59. | Golden Age Inspiration | 14 | Show |
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| 60. | The Theatrical World of Agatha Christie | 15 | Show |
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| 61. | Policing the Detectives | 16 | Show |
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| 62. | Queer Clues | 17 | Show |
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| 63. | Young Sleuths | 17 | Show |
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| 64. | The Dark Side of True Crime | 18 | Show |
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| 65. | Double Trouble | 18 | Show |
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| 66. | Florence Maybrick II | 18 | Show |
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| 67. | Cricket And Crime | 20 | Show |
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| 68. | Death Sets Sail On The Nile with Robin Stevens | 19 | Show |
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| 69. | Cryptic Crimes | 24 | Show |
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| 70. | At Home With Agatha Christie | 19 | Show |
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| 71. | Hercule Poirot's Swan Song | 20 | Show |
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| 72. | Who Was Robert Eustace? | 30 | Show |
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| 73. | At The Old Bailey | 20 | Show |
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| 74. | Period Style with Jacqueline Winspear | 21 | Show |
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| 75. | The Shedunnit Centenary | 21 | Show |
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| 76. | The Trials of Madeleine Smith | 21 | Show |
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| 77. | Crippen | 21 | Show |
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| 78. | Murder in a Heatwave | 28 | Show |
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| 79. | Peace At Last | 31 | Show |
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| 80. | The Golden Age Autopsy | 23 | Show |
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| 81. | A Room Of One's Own | 25 | Show |
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| 82. | You Probably Imagined It! | 34 | Show |
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| 83. | Murder On Holiday | 24 | Show |
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| 84. | The Murder on the Links by Agatha Christie | Green Penguin Book Club, Episode 2 | 32 | Show |
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| 85. | Knock Knock | 33 | Show | Knock-Knock
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| 86. | Dylan's Whodunnits | 26 | Show |
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| 87. | Edith Thompson | 26 | Show |
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| 88. | A Prize Mystery | 24 | Show |
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| 89. | Death Under Par | 25 | Show |
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| 90. | The Hay Poisoner | 47 | |
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| 91. | The Long Shadow of Edgar Allen Poe | 25 | Show |
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| 92. | A Detective's Farewell | 25 | Show |
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| 93. | A Second Century of Whodunnits | 25 | Show |
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| 94. | Death at the Speakeasy | 31 | Show |
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| 95. | Florence Maybrick I | 25 | Show |
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| 96. | Whodunnit Centenary: 1924 | 34 | Show |
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| 97. | Spoiler Warning (No Spoilers) | 30 | Show |
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| 98. | Christianna Brand's Impossible Crimes | 34 | Show |
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| 99. | The Mutual Admiration Society | 25 | Show |
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| 100. | Queering The Golden Age Murder Mystery | 25 | Show |
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