| 101. | Crippen | 21 | Show |
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| 102. | At The Old Bailey | 20 | Show |
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| 103. | Hercule Poirot's Swan Song | 20 | Show |
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| 104. | Who Was Robert Eustace? | 30 | Show |
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| 105. | Cricket And Crime | 20 | Show |
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| 106. | Cryptic Crimes | 24 | Show |
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| 107. | Death Sets Sail On The Nile with Robin Stevens | 19 | Show |
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| 108. | At Home With Agatha Christie | 19 | Show |
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| 109. | Florence Maybrick II | 18 | Show |
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| 110. | The Dark Side of True Crime | 18 | Show |
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| 111. | Double Trouble | 18 | Show |
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| 112. | Young Sleuths | 17 | Show |
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| 113. | Queer Clues | 17 | Show |
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| 114. | Policing the Detectives | 16 | Show |
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| 115. | The Theatrical World of Agatha Christie | 15 | Show |
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| 116. | Golden Age Inspiration | 14 | Show |
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| 117. | The Whodunnit in India | 13 | Show |
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| 118. | At Home With Shedunnit | 10 | Show |
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| 119. | The Secret Society Behind Our Favourite Novels | 8 | |
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| 120. | How did this mystery writer disappear from history? | 7 | |
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| 121. | Agatha Christie: The Dispenser | 23 | Show |
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| 122. | Why *are* there so many golf murder mysteries? | 6 | |
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| 123. | The Christie Completists | 19 | Show |
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| 124. | Agatha Christie's Surprising Move Beyond the Golden Age of Detective Fiction | 4 | |
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| 125. | #mysterybooks #mystery #crimefiction | 2 | |
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| 126. | The Queen of True Crime | 0 | Show |
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| 127. | Surplus Women | 0 | Show |
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| 128. | Looking East | 0 | Show |
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| 129. | The Mystery Short Story | 61 | |
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| 130. | The Poisoned Chocolates Case by Anthony Berkeley | Green Penguin Book Club, Episode 5 | 35 | |
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| 131. | The Collectors | 47 | |
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| 132. | Oxford vs Cambridge | 73 | |
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| 133. | The Crimes of Dorothy Erskine Muir | 61 | |
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| 134. | Father Christmas | 50 | |
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| 135. | Mysterious Knitting | 65 | |
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| 136. | Edmund Crispin's Inside Jokes | 56 | |
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| 137. | Competent Women | 73 | |
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| 138. | Ranking Christianna Brand | 44 | |
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| 139. | Cui Bono? | 50 | |
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| 140. | In The Dentist's Chair | 46 | |
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| 141. | Enter The Watson | 72 | |
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| 142. | The Murder Mystery Hotline II | 54 | |
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| 143. | Agatha Christieβs Taste in Crime Fiction | 75 | |
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| 144. | Rediscovering Miss Marple | 79 | |
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| 145. | The Cluefinder | 12 | |
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| 146. | The True Crime Case of Nurse Daniels | 47 | |
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| 147. | The Other Detectives | 63 | |
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| 148. | The Poison Book | 63 | |
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| 149. | The Missing Moneylender by W. Stanley Sykes | Green Penguin Book Club, Episode 7 | 47 | |
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| 150. | Pseudonyms | 51 | |
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| 151. | On Gaudy Night by Dorothy L Sayers | 120 | |
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| 152. | An Inspector Calls | 53 | |
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| 153. | Crime at Christmas | 64 | |
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| 154. | The Red Barn Murder | 35 | |
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| 155. | Dining with Death | 55 | |
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| 156. | The Four Just Men by Edgar Wallace | Green Penguin Book Club, Episode 9 | 47 | |
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| 157. | Instrument of Death | 35 | |
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| 158. | Teaching Sleuthing | 52 | |
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| 159. | Notable Trials | 50 | |
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| 160. | The Mysterious Affair at Styles by Agatha Christie | Green Penguin Book Club, Episode 6 | 56 | |
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| 161. | Death on Paper | 55 | |
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| 162. | The Man in the Dark by John Ferguson | Green Penguin Book Club, Episode 10 | 34 | |
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| 163. | Raffles by E.W. Hornung | Green Penguin Book Club, Episode 8 | 34 | |
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| 164. | Mr Fortune, Please by HC Bailey | Green Penguin Book Club, Episode 4 | 30 | |
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| 165. | The Psychology Of Anthony Berkeley | 59 | |
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| 166. | Bedside Manner | 59 | |
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| 167. | Notes and Queries | 49 | |
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| 168. | On The Thames | 53 | |
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| 169. | Round Robin | 55 | |
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| 170. | Whodunnit Centenary: 1925 | 71 | |
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| 171. | All At Sea | 46 | |
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| 172. | Murder at the Bookshop | 65 | |
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| 173. | The Box of Delights | 44 | |
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| 174. | Vanishing Corpses | 63 | |
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