Thanks for the tip, but . . .
I just went and checked the cable guide, and I noticed that it was an BBC ‘Airport’ program. Then I noticed another ‘Airport’, and another. It’s a ‘Airport’ Marathon. Just to make sure I checked The Discovery Wings site, and sure enough it’s a marathon! They are calling it ‘Heathrow A to Z’.
The first episode airs at 6pm (3pm PST) and then starts repeating at 2:00 am Saturday. The marathon continues through Sunday till 6pm.