A school trip to the hospital takes a dramatic turn when two injured cops are admitted. Elsewhere, Amelia must face her feelings for Owen.
A mass shooting occurs at an athletic club; Atwater comes to terms with his new assignment; Halstead works with Platt to check on Lindsay.
Zoe and Wade feel unprepared for parenthood; a surprise shakes Brick to the core.
The CSI team suspects foul play when a chemistry teacher's science experiment goes horribly wrong. As the crew investigate they stumble upon an underground Wicca society.
Taylor attempts to return to normalcy by attending a public high school; the Leyland School team prepares for invasive DNA testing, but this forces Eric to make a painful confession.
