Users can watch the latest episode of "Chicago Fire" via NBC or Hulu or by purchasing it through iTunes or Amazon.com. As of 2015, both NBC and Hulu allow users to watch the last five episodes that have aired without the need to subscribe to a participating cable company.
Users who subscribe to an NBC-affiliated cable provider can watch the entire current season of "Chicago Fire." NBC's website lists the cable providers whose users qualify for this option. Qualifying users log in with their cable provider account to access the streaming feature. Entire seasons of "Chicago Fire" are available for purchase on Amazon.com as well.