This week in TV Guide: July 21, 1973

The year is 1967, and you're a Navy flier in Vietnam. While flying a mission on May 18 of that year, you're shot down over North Vietnam and taken prisoner. For nearly six years, until March 4, 1973, you're shuttled from prison to prison, including the infamous "Hanoi Hilton." During that time, you've missed Laugh-In, the Smothers Brothers, and Neil Armstrong walking on the moon. You didn't see the end of The Fugitive, Peyton Place or The Ed Sullivan Show. You've never seen Monday Night Football or Big Bird. Even though it's only (!) been six years, you have, in essence, missed an entire generation of American pop culture. This is the world that Lt. Robert Naughton returned to when he was released from North Vietnam custody, and this week he tells Clifford Terry how television has changed during his time as a POW.He never saw television during those six years, but he and his fellow prisoners talked about it. "I must give it credit for providing us with a lot of entertainment," he…