Behind the Scenes: Chicago Fire, PD, Med & Justice film four-way crossover [VIDEO]

Get a behind the scenes look into this week's four-way crossover event of NBC's Chicago Fire, PD, Med and new show, Justice. 

The crossover kicks off with Chicago Fire's March 1st installment "Deathtrap," when Firehouse 51 responds to the scene of a harrowing blaze that endangers the lives of many. 

Enjoy the clip below!



Source: TV Guide