This is the first episode of this show that I saw. This is the one that got me hooked on this show. From that time on, I have watched every episode, including binge watching the first four seasons on Prime Video. Unfortunately, Prime doesn't have any seasons beyond number four. I was able to find the discs at a local library, and I binge watched season five.
What got me going was the high drama, and the likability of the main characters and the reality of their lives and the incidents of their rescue missions. The scene with Kelly and Anna in the "Carry Me" episode, was well done, gripping, painful, and emotional. Chicago Fire is just another excellent Dick Wolfe drama.