National Geographic Channel Looks at Yellowstone, Yosemite

I blew it. Last week a friend gave me advance notice that the National Geographic Channel had two new hour-long shows featuring Yellowstone and Yosemite.
The shows aired last night. Naturally, I forgot all about it and instead watched the Yankees get ripped by lowly Tampa Bay.
Fortunately, the program will be repeated this Friday, the 27th, with Yellowstone on at 9 p.m. Eastern and Yosemite an hour later. Let's see if I can remember this time.


Please can someone tell me when and if these programmes are to be aired in the UK. Thanks