It wasn’t a Super Bowl, it was an important late season game between the Jets (with Joe Willie Namath) and I forget who. I think the Jets were down before the switch, but came back to win the game while Heidi was on. The win put them in the playoffs I think.
Oakland Raiders. I was watching, and boy was I pi$$ed! “Heidi” of all things.
“On November 17, 1968, the Oakland Raiders score two touchdowns in nine seconds to beat the New York Jets—and no one sees it, because they’re watching the movie Heidi instead. With just 65 seconds left to play, NBC switched off the game in favor of its previously scheduled programming, a made-for-TV version of the children’s story about a young girl and her grandfather in the Alps. Viewers were outraged, and they complained so vociferously that network execs learned a lesson they’ll never forget: “Whatever you do,” one said, “you better not leave an NFL football game.”
http://www.history.com/this-day-in-history/the-heidi-bowl