TODAY 8a: Meet Team USA’s Alysa Liu and Hilary Knight. Best fitness products. Kristen Bell on new murder-mystery show.

Countdown to the Winter Olympics — meet Team USA figure skater Alysa Liu and hockey player Hilary Knight. Plus, Jill Martin has all the products you need to refresh your fitness routine. And, Hoda Kotb and Carson Daly chat with Kristen Bell about her new Netflix show “The Woman in the House Across the Street from the Girl in the Window.”