Mark Your Calendars For the 20 Biggest TV Events of 2018

The Olympics will dominate NBC's family of networks for two weeks in February. What to watch for: Lindsey Vonn returns to the Olympics after being plagued by injuries for the past several years; Nathan Chen may be the USA's best chance to medal in figuring skating; the women's hockey rivalry between the US and Canada; Chloe Kim is a rising star in the snowboarding world and she goes into the Olympics ranked No. 1 in the world. And, of course, the figure skating.

When: Feb. 9-25