Although Chicago Med, Chicago Fire, and Chicago P.D. on NBC Wednesday nights are very different shows despite sharing a universe, a city, and often characters for cameos, there is one way (other than ratings) that the shows remain consistent with each other: the timeline. They don't all have to cover the same cases, and the various shows regularly visit other hospitals, firehouses, and/or precincts if a crossover isn't feasible. The story gets precedent over a crossover, and fans don't have to suspend their disbelief or ignore inconsistencies in the timeline.

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What Grey's Anatomy And Station 19 Need To Learn From NBC's One Chicago - CinemaBlend