For the next few days in this space, Bianculli’s Best Bets is going to be unabashedly self-serving – and recommend one TV documentary a night that features, well, Bianculli. My association with the CNN documentaries examining specific decades began with The Sixties, and has continued for every 10-year period of television covered in the opening installments since then. This Sunday, the newest entry, the opening-day TV episode of The 2000s, premieres – and as a buildup, on this slow summer TV post-holiday stretch, CNN is presenting nightly reruns of most of the other offerings in this series: The Nineties on Saturday, The Eighties tomorrow, and, tonight, The Seventies. Each entire series is excellent – I say that not because I’m in the openers, but in spite of that fact – but, selfishly, I’m noting only the repeats of the opening, TV-themed episode. (For other installments each evening, just keep watching.) Tonight’s episode, “TV Gets Real,” covers everything from All in the Family and M*A*S*H to the miniseries phenomenon of Roots (pictured).