| No. | Term | Definition |
|---|---|---|
| 1. | 13 lives | Traditional Time Lord regeneration limit. |
| 2. | 50th Anniversary | The Day of the Doctor special. |
| 3. | Akhaten | Planet with a singing sun god. |
| 4. | Allons-y | Tenth Doctor’s catchphrase: “Let’s go!” |
| 5. | Angels take Manhattan | Episode featuring Weeping Angels in NYC. |
| 6. | Arcadia | Gallifreyan city in the Time War. |
| 7. | AUDIO drama | Doctor Who stories in audio format. |
| 8. | Auton | Plastic humanoid controlled by Nestene. |
| 9. | Bad Wolf | Rose’s recurring message and paradox. |
| 10. | BBC Radiophonic Workshop | Created early Doctor Who soundscapes. |
| 11. | Big Finish | Company producing Doctor Who audios. |
| 12. | Bigger on the inside | TARDIS interior exceeds exterior size. |
| 13. | Biodata | Time Lord personal timeline record. |
| 14. | Blinovitch Limitation | Time travel contact causes paradox energy. |
| 15. | Bow tie | Eleventh Doctor’s signature accessory. |
| 16. | Captain Jack Harkness | Immortal Time Agent from Torchwood. |
| 17. | Cardiff Rift | Space-time crack beneath Cardiff. |
| 18. | Chameleon Arch | Device to rewrite biology and memory. |
| 19. | Chronon | Time-energy particle used in plots. |
| 20. | Clara Oswald | Companion: the Impossible Girl. |
| 21. | Classic Who | Doctor Who from 1963–1989. |
| 22. | Companion | Friend who travels with the Doctor. |
| 23. | Console room | Main TARDIS control chamber. |
| 24. | Cyberman | Cybernetic humans seeking conversion. |
| 25. | Dalek | Mutant xenophobes in battle casings. |
| 26. | Davros | Creator of the Daleks. |
| 27. | Dematerialisation | TARDIS vanishing into the time vortex. |
| 28. | Doctor-lite | Episode with minimal Doctor presence. |
| 29. | DoctorDonna | Donna fused with Time Lord mind. |
| 30. | Doomsday | Daleks vs Cybermen; Rose lost. |
| 31. | Expanded Universe | Non-TV stories: books, audios, comics. |
| 32. | Exterminate | Dalek command to kill. |
| 33. | Eye of Harmony | Black hole powering the TARDIS. |
| 34. | Face of Boe | Ancient, enigmatic, immortal being. |
| 35. | Faction Paradox | Time-travel cult from expanded universe. |
| 36. | Fandom | Community of Doctor Who enthusiasts. |
| 37. | Fix point in time | Event time cannot be changed. |
| 38. | Flux | Universe-shattering event in Thirteenth era. |
| 39. | Fob watch | Container for Time Lord identity. |
| 40. | Gallifrey | Homeworld of the Time Lords. |
| 41. | Gally | Fan shorthand for Gallifrey. |
| 42. | Genesis of the Daleks | Serial about Dalek creation origins. |
| 43. | Guns are bad | Doctor’s recurring anti-gun stance. |
| 44. | Hand of Omega | Gallifreyan stellar manipulation device. |
| 45. | Harriet Jones | Prime Minister: “Yes, we know.” |
| 46. | Headcanon | Personal fan interpretation as truth. |
| 47. | Human Nature | Story of Doctor as human teacher. |
| 48. | Impossible Girl | Clara’s mystery across Doctor’s timeline. |
| 49. | Jelly Baby | Fourth Doctor’s favored sweet. |
| 50. | Judoon | Rhinoceros-like police for hire. |
| 51. | K-9 | Robotic dog companion with laser nose. |
| 52. | Kerblam! | Delivery company episode with robots. |
| 53. | Kovarian Chapter | Silence splinter group opposing the Doctor. |
| 54. | Last Great Time War | Conflict between Time Lords and Daleks. |
| 55. | Library, The | Planet-sized database; River’s debut. |
| 56. | Looms | Expanded-universe Time Lord reproduction method. |
| 57. | Master | The Doctor’s renegade Time Lord rival. |
| 58. | Metacrisis | Human-Time Lord hybrid consciousness event. |
| 59. | Moffat era | Showrunner period under Steven Moffat. |
| 60. | Mondasian Cybermen | Original Cybermen from planet Mondas. |
| 61. | Nardole | Companion from The Husbands of River Song. |
| 62. | Nestene Consciousness | Entity controlling Autons. |
| 63. | New Who | Doctor Who since 2005 revival. |
| 64. | Oncoming Storm | Name for the Doctor in legend. |
| 65. | Ood | Telepathic servants with hindbrain in hand. |
| 66. | Pandorica | Prison built to contain the Doctor. |
| 67. | Paradox | Time contradiction central to many plots. |
| 68. | Psychic paper | Blank paper showing expected credentials. |
| 69. | Rassilon | Founder figure of Time Lord society. |
| 70. | Regeneration | Time Lord body renewal after fatal injury. |
| 71. | Rift | Tear in space-time enabling travel. |
| 72. | River Song | Time-traveling archaeologist; loves the Doctor. |
| 73. | Rory Williams | Amy’s husband; steadfast companion. |
| 74. | Screwdriver, sonic | Doctor’s multi-purpose tool; not a weapon. |
| 75. | Shadow Proclamation | Intergalactic police and justice authority. |
| 76. | Showrunner | Lead creative producer for a series. |
| 77. | Silence, The | Species you forget when unseen. |
| 78. | Sisterhood of Karn | Elixir guardians aiding regenerations. |
| 79. | Skaro | Dalek home planet. |
| 80. | Slitheen | Raxacoricofallapatorian skin-suit infiltrators. |
| 81. | Sontaran | Clone warrior species obsessed with war. |
| 82. | Spin-off | Related series like Torchwood, Sarah Jane. |
| 83. | Spoilers | River’s frequent warning about timelines. |
| 84. | Stolen Earth | Planets relocated by Daleks. |
| 85. | Stormcage | Prison where River is incarcerated. |
| 86. | TARDIS | Time And Relative Dimension In Space. |
| 87. | TARDIS key | Key granting access to the TARDIS. |
| 88. | TARDIS translation | Matrix that translates most languages. |
| 89. | The Doctor | Time Lord traveler and healer-adventurer. |
| 90. | Time Lord | Gallifreyan with time travel mastery. |
| 91. | Time Vortex | Dimension used for time travel. |
| 92. | Torchwood | Earth defense institute; Doctor Who spinoff. |
| 93. | Trenzalore | Planet of the Doctor’s long siege. |
| 94. | UNIT | Unified Intelligence Taskforce; Earth defenders. |
| 95. | Untempered schism | Time Vortex window seen by young Time Lords. |
| 96. | Valeyard | Dark future aspect of the Doctor. |
| 97. | Vashta Nerada | Piranhas of the air; living shadows. |
| 98. | Vortex manipulator | Wrist device enabling time travel. |
| 99. | Weeping Angel | Quantum-locked predator; moves when unseen. |
| 100. | Whoniverse | Doctor Who shared fictional universe. |