Take 5, Issue #15

[chris1955]

1.  74
2.  Koa
3.  Pens
4.  Blame
5.  Tapioca
6.  Title
7.  Magic
8.  Robert
9.  Sauce
10. Obtuse
11. Photographers
12. Passenger
13. 8
14. 42
15. 2
16. 91
17. Rent
18. Chest
19. Palm Tree
20. B
21. Jump
22. Damsel
23. Chard
24. Generation
25. Worm
26. Seat
27. Fate
28. Prevalent
29. Saloon
30. Cases
31. Cards
32. Polite
33. Texture
34. Wuthering Heights
35. Massive
36. Harm
37. 1
38. Misunderstanding
39. Riddle
40. Honest
41. Sculpture
42. Strolling
43. Tubular
44. 6
45. AMP
46. Pencil
47. Attention
48. Just in Time
49. Willem Dafoe
50. Gratitude
51. Chic
52. Lion
53. Three
54. 6 (2+4)
55. Wilts
56. D
57. Blue
58. Lamp

[Arran]

I just have one difference, no. 53 I have Five

[The Wee One]

I  have Five for No. 53 also

[chris1955]

I can only locate three times that the Summer Olympics have been held in the Southern Hemisphere - Melbourne (1956), Sydney (2000) and Rio de Janeiro (2016).

Which means, of course, that you are both correct, in that the remaining answer is Five.  My bad. Sorry.