| Episode | Alien |
|---|
| 1. All | |
| 2. Deep Breath, Into the (#5), The Caretaker, Flatline, In the Forest of the Night, Dark Water, Death in Heaven, The Magician's Apprentice, The Witch's Familiar, others | |
| 3. Deep Breath | |
| 4. Deep Breath | |
| 5. Into the (Answer), The Magician's Apprentice, The Witch's Familiar, The Pilot | |
| 6. Time Heist | |
| 7. The Caretaker | |
| 8. Kill the Moon | |
| 9. Mummy on the Orient Express | |
| 10. Mummy on the Orient Express | |
| 11. Flatline | |
| 12. Dark Water, Death in Heaven, World Enough and Time, The Doctor Falls | |
| 13. Last Christmas | |
| 14. Before the Flood | |
| 15. The Girl Who Died | |
| 16. The Woman Who Lived | |
| 17. The Woman Who Lived | |
| 18. The (Answer) Invasion, The (Answer) Inversion | |
| 19. Sleep No More | |
| | Episode | Alien |
|---|
| 20. Face the Raven | |
| 21. Face the Raven | |
| 22. Heaven Sent | |
| 23. Hell Bent | |
| 24. The Husbands of River Song | |
| 25. The Husbands of River Song | |
| 26. The Husbands of River Song, The Return of Doctor Mysterio | |
| 27. The Pilot | |
| 28. The Pilot | |
| 29. Smile | |
| 30. Smile | |
| 31. Thin Ice | |
| 32. Knock Knock | |
| 33. Extremis, Pyramid at the End of the World, The Lie of the Land | |
| 34. Empress of Mars | |
| 35. Empress of Mars | |
| 36. The (Answer) | |
| 37. Glass Avatar | |
|
