Season 16, episode 20
Daydream Believer (III)
- 43 min
A Chicago crime resembles a decade-old New York City case, so police from Chicago arrive and team up with the squad to track down a suspect they had to release earlier.
The crossover starts on Chicago Fire S03E21 We Called Her Jellybean (I) and Chicago P.D. S02E20 The Number of Rats (II).