ACROSS 1. Marine from Mayberry 5. Lessens 9. Financial backer 14. Existent 15. Cheap magazine material 16. Like some boas 17. Machine that can think, to some degree 20. Chuck Todd's network 21. Without delay 22. Anticounterfeiting agents 23. White Russian component 25. Actor Reeves of "Speed" 27. Alternative to a local 32. "Time ___" (1990s sci-fi TV series) 35. Woody Allen's "Hannah and ___ Sisters" 36. Squalid 37. Stimpy's cartoon bud 38. African serpent 39. Uncle of Barbara and Jenna 41. Make haste, quantly 42. Tatum of "Paper Moon" 44. Clink 45. Fails to exist 46. Hopelessly kaput 50. Former Red Sox star Garciaparra 51. Beale Street blues legend 55. Sauce brand 58. Divine revelation 60. Nairn negative 61. Contrary to convention or norms 64. Extreme factions 65. Consider, judicially 66. Facts, say 67. Cla** that's a snap 68. Disclaimer of a sort 69. Western Colorado feature DOWN 1. Mischievous caper 2. San Francisco Bay's ___ Buena Island 3. Gate feature 4. Inventor Whitney 5. Famous last words? 6. Osso ___ 7. Indicator on a vehicle 8. Parking garage allotments 9. Fliers' mil. post 10. Feed and protect 11. Tiny weight unit 12. Iroquoian tribe 13. Loretta of country music 18. ___ pas (social blunder) 19. Grazing grounds 24. Superman's foe Luthor 26. Accident investigation gp. 28. Business agent, for short 29. Contented sighs 30. Poker player's phrase 31. Turndown from Putin 32. Walked on 33. Tahoe gateway 34. With a clean slate 38. Saxophone variety 39. Word after Leyden or Mason 40. People whose "help" may actually be hurtful 43. Investment vehicle 44. Some bank ad statistics (abbr.) 45. Printer cartridge filler 47. Managed care a**ns. 48. Kitt who sang "Santa Baby" 49. "___ your pardon!" 52. Mindless 53. Innocent sorts 54. Birthplace of Columbus 55. Hambletonian, e.g. 56. Restaurante request 57. They go with guys 59. Indian spiced tea 62. Super-secret government group (abbr.) 63. Part of a crater