Full credits

On screen, in billing order

1. 1Al Molinaroas Al Delvecchio
2. 2Alan Oppenheimer
3. 3Anne Lockhart
4. 4Anson Williamsas Potsie Weber
5. 5Audrey Landers
6. 6Ben Davidson
7. 7Billie Bird
8. 8Billy Warlock
9. 9Cassandra Peterson
10. 10Cheryl Ladd
11. 11Craig Stevens
12. 12Crystal Bernard
13. 13Dave Madden
14. 14Dean Devlin
15. 15Don Mostas Ralph Malph
16. 16Ed Peck
17. 17Eileen Dietz
18. 18Elinor Donahue
19. 19Erin Moranas Joanie Cunningham
20. 20F. William Parker
21. 21Frances Bay
22. 22Fred Allen
23. 23Gary Grubbs
24. 24Gavan O'Herlihyas Chuck Cunningham
25. 25George Furth
26. 26Grant Heslov
27. 27Heather O'Rourke
28. 28Henry Beckman
29. 29Henry Winkleras Fonzie
30. 30Jack Perkins
31. 31Jack Riley
32. 32Jane Wyatt
33. 33Janis Paige
34. 34Jesse White
35. 35Julie Brown
36. 36Karen Austin
37. 37Karl Swenson
38. 38Katherine Kelly Lang
39. 39Ken Lerner
40. 40Leon Askin
41. 41Linda Purl
42. 42Lou Wagner
43. 43Lynda Goodfriend
44. 44Marion Rossas Marion Cunningham
45. 45Marjorie Bennett
46. 46Martin Ferrero
47. 47Maureen McCormick
48. 48Michael Dudikoff
49. 49Miles Edgeworth
50. 50Nellie Bellflower
51. 51Nobu McCarthy
52. 52Pat Crowley
53. 53Pat Morita
54. 54Penny Marshall
55. 55Peter Brocco
56. 56Phil Silvers
57. 57Priscilla Allen
58. 58Randolph Robertsas Chuck Cunningham
59. 59Reb Brown
60. 60Robin Mattson
61. 61Robin Williams
62. 62Ron Howardas Richie Cunningham
63. 63Scott Baioas Chachi Arcola
64. 64Scott Marshall
65. 65Steven Ford
66. 66Susan Richardson
67. 67Talia Balsam
68. 68Ted McGinleyas Roger Phillips
69. 69Tom Bosleyas Howard Cunningham
70. 70Tony Randall
71. 71Tracie Savage
72. 72Valerie Curtin
73. 73Virginia Gregg
74. 74Vito Scotti