Gary, I vividly remember "POW!" It was VERY hip, and at the same time low-key. It used Dave Brubeck's "Take Five" as its theme music, and the end credits would roll over old nickelodeon/silent film footage. They aired "Flash Gordon" serial episodes and sometimes had musical guests, including the Vince Guaraldi Trio.
That was part of my pre-"60 Minutes" Sunday TV, which also included "The French Chef" and an hourlong Mexican folkloric music and dance program which was probably locally produced, both on KQED (their feed was from NET, before it was renamed PBS), and Walter Cronkite's "The Twentieth Century."