Between the high-octane rescue missions and gripping Firehouse 51 drama, Season 13 of Chicago Fire has been a heated watch. After enjoying the first One Chicago crossover in five years, viewers can't wait to return to Firehouse 51 with Chicago Fire's fearless crew.

NBC’s One Chicago is airing its first crossover in five years tonight. Here’s how to watch the epic event featuring "Chicago Fire," 'Chicago Med," and "Chicago P.D.."

The crossover starts at 8 p.m. with "Chicago Fire" followed by "Chicago Med" at 9 p.m. and "Chicago P.D." at 10 p.m.

For the first time in five years, “Chicago Med,” “Chicago Fire” and “Chicago P.D.” are crossing over on Jan. 29. Here's how to watch the episodes and the order they're in.

One Chicago made some notable changes to its schedule for the January 29 crossover event. The regular order of shows was switched around, so that Chicago Fire kicked off the action instead of airing second,

Between the gripping three-part One Chicago crossover, turmoil at the hospital, and several newcomers making themselves at home at Gaffney, Season 10 of Chicago Med has been delivering some seriously intense drama and action.