WTHR (Channel 13) is NBC's local affiliate in Indianapolis. This is where you can watch NBC staples like Saturday Night Live, The Today Show, Law & Order, and Dateline along with local news programs and live sports events. Specifically, the channel has rights to cover games involving the WNBA’s Indiana Fever, Purdue and Indiana University’s football games, NASCAR’s Indy 500, NFL’s Sunday Night Football, and of course, The Olympics.
You can watch WTHR for free if you have an antenna. You can also download the channel's app, again at no additional cost, and be updated with the latest local news and weather forecasts right on your mobile or smart TV.
However, if you want to watch it with a live streaming service, your best options are DirecTV Stream, because of all the many other channels it comes with, and Peacock, the more economic but still stable, NBC-owned choice. You can read more about them below.