There are several harsh truths about Chicago PD season 1 that become apparent on rewatch. The popular police procedural debuted in 2012 as a mid-season replacement and first spinoff of Chicago Fire; 10 years later, it is still one of the best shows in the One Chicago universe, although there have been many changes in the cast and the direction of storylines. This includes the elimination of patrol officers from the Chicago PD cast and the development of several romantic couples.
