Chloe and Andy are on scene when an explosion rocks a parking garage.
Andy chases a suspect who flees from a crime scene.
A gas leak threatens the lives of Dov, Chris and an injured victim.
What evidence does Duncan have on Andy?
Sam's father threatens his badge.
Chris seems to be protecting a drug dealer.
Andy needs help protecting a witness, but will Duncan have her back?
Andy and Duncan have to draw their weapons when a suspect pulls a knife.