The stunning panoramic views of London featured throughout NBC's coverage of the summer Olympic Games make it hard to imagine the devastation that occurred 72 years ago during the Blitz. 

While it might harsh your Olympic-induced mellow, Tom Brokaw takes an intense look back at how the city survived the barbarism of Adolf Hitler's Germany in the two years before the U.S. entered World War II with "Their Finest Hour" (Saturday, 8/7c).

The documentary precedes the final night of competition coverage that includes track and field, and gold medal finals in men's platform diving and women's volleyball. But it's a worthwhile break in the action. 

"What England went through in 1940 and '41 will endure forever as a lesson in courage, national resolve and the power of enlightened leadership," Brokaw told TV Guide Magazine. "Against great odds, the UK kept Hitler from using this island nation as a launching pad for expanding his evil empire. We owe this country and that time a great debt."