Here are some commercials that aired during part 1 of The NBC Mini-Series presentation of Merlin:

1. Chrysler 300 Sponsor & commercial
2. M&Ms
3. Babe: Pig in The City TV trailer
4. CellularOne
5. Little Debbie Sweet Snacks
6. Mad About You NBC promo
7. 3rd Rock from The Sun NBC promo
8. Chrysler/Plymouth Motors
9. Kodak Advantix
10. A1 Steak Sauce
11. MCI
12. (same as #1)
13. McDonald’s (Disney’s Animal Kingdom)
14. Clairitin
15. ‘Merlin’ will return in a moment on NBC!
16. Law & Order NBC promo
17. Days of Our Lives NBC promo
18. BellSouth
19. Ford Escort
20. PrimeCo
21. NewsChannel 2 at 11:00pm promo bumper
22. Chrysler Concorde LX
23. Godzilla TV trailer
24. Sears
25. (same as #13)
26. Platinum MasterCard
27. Allegra
28. (same as #15)
29. The World’s Most Dangerous Magic NBC promo
30. Tonight on NewsChannel 2 at 11:00pm...
31. National-Louis University
32. Mazda Protege
33. Aerial Wireless
34. O'Doul's Beer
35. Pedigree Dog Dentabone
36. Quest for Camelot TV trailer
37. GAP Khaki Jeans
38. Carnival Cruises
39. Jeep Vehicles
40. Frasier NBC promo
41. Dateline NBC promo
42. The Long Island Incident NBC promo
43. Jeep Grand Cherokee
44. Burger King
45. Coldwell Banker
46. Friskies Alpo Dog Food
47. Serta Mattress
48. (same as #15)
49. ER NBC promo
50. Wendy's Spicy Chicken Fillet Sandwich
51. Ford Taurus
52. (same as #20)
53. Mazda 626 LX
54. (same as #50)
55. Winn-Dixie Marketplace
56. Who's Watching Florida's Children? NewsChannel 2 promo
57. (same as #30)
58. Les Miserables TV trailer
59. (same as #13)
60. Sprint
61. Chrysler Town & Country
62. Ked’s Shoes
63. Kodak Advantix Cameras
64. Friends/Just Shoot Me!/Seinfeld NBC promos
65. Witness To The Mob NBC promo
66. Stay tuned for scenes...
67. Next on NewsChannel 2 at 11:00pm...
68. Claritin RediTabs
69. (same as #44, #11 & #1)
70. FreshBurst Listerine Mouthwash
71. Trident Sugarless Gum
72. Merlin NBC promo

Video footage courtesy of munichmarvel at archive.org
All credit of this footage goes to him!