Oliver's Christmas Megapuzzle

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Across
  1. 5. GTA V, Westworld, The Walking Dead actor (5,3)
  2. 8. Harvard case subject (11,6)
  3. 10. Mancuian desert brothers (10)
  4. 12. Charlie Pace's band (5,5)
  5. 13. Gus and his fowl siblings (3,6,8)
  6. 14. Illinois City ruled by Don Salieri (4,6)
  7. 15. First name of 46th US President (3)
  8. 17. Jedi not known for dual-wielding (5,4)
  9. 18. Mummy's new Christmas fascination (4)
  10. 19. She's like a cat in the dark (8)
  11. 24. Communications Officer NCC1701 (5)
  12. 25. Twisting street urchin (6)
  13. 26. 'Henry Gale'? (8,5)
  14. 29. Boxing partner (5)
  15. 30. Minecraft protagonist (5)
  16. 33. Share the cost of a meal "Go..." (5)
  17. 34. Daughter of Aerys and Rhaella (8)
  18. 35. Bruno Mars real first name (5)
  19. 36. Helps you get a'head' (5)
  20. 39. Coming in 2025 (3,2)
  21. 40. First name of Travis Kelce's girlfriend (6)
  22. 42. Destroyer of Thor (5,7)
  23. 45. Mary Poppins in space (5)
  24. 46. Ran over Sandra Redknapp (5)
  25. 48. Home of the souls of slain heroes (8)
  26. 50. When I sing along with you (8)
  27. 52. Spanish version of Ann (5)
  28. 53. Teignmouth musician (4,7)
  29. 54. Study of mind & behaviour (10)
  30. 56. Lost astronaut (5,3)
  31. 57. King of the Jews (5,6)
  32. 58. Deceased fruity tech entrepreneur (5,4)
  33. 59. Never eating it again (7)
  34. 60. Mummy's Christmas fascination (10)
  35. 62. Back in the Lands Between (9)
  36. 64. Boxer Khan's first name when backwards (4)
  37. 65. Constance Langdon (7,5)
  38. 66. Been locked inside for weeks (5,6,3)
  39. 67. Hospital for the criminally insane (10)
Down
  1. 1. Sounds like a French drummer (4,4)
  2. 2. 2RDR's lrigwoc Eidas .... (5)
  3. 3. Bereft of me (6,3,5)
  4. 4. Mysterious mountain (7)
  5. 6. Superman or The Atom? (7,5)
  6. 7. Southern idiots (7,7)
  7. 8. Emily Blunt Emily Blunt Emily Blunt (5,2,6)
  8. 9. Yellow ninja (8)
  9. 11. OH.MY.GOD (6)
  10. 16. Wade Wilson (8)
  11. 20. Sting's wife ... Styler (6)
  12. 21. Tommy wasn't made, he was ... (7)
  13. 22. Son of Mogh (no, not that one) (4)
  14. 23. Sin city is cold and empty (8,6)
  15. 27. Nemesis (2,7)
  16. 28. Santa Monica game developer (7,3)
  17. 31. T-virus instigators (8)
  18. 32. Died of a broken heart (5,7)
  19. 33. Neil ..., video game writer/director (9)
  20. 37. MI nation (5)
  21. 38. Higher, further, faster (7,6)
  22. 41. Mother of Atreus (6)
  23. 43. Taylor Joy (4)
  24. 44. Sarcastic mister know it all (4,6)
  25. 47. Not senior (6)
  26. 49. Belgian detective (6)
  27. 51. Monty Python's Life of ... (5)
  28. 55. Himmler's crew (13)
  29. 57. Protector of the island against the Mongol invasion (3,5)
  30. 58. R3 + L3 (7,4)
  31. 61. Joel? Bruce? (4,5)
  32. 63. The Modern Science of Mental Health (9)