Jacqueline Williams

Michael tries to figure out how to tunnel in a building that houses a guards' break room, Kellerman and Hale attempt to kill Veronica and LJ, and T-Bag tries to dodge responsibility for Bob's murder.

With Lincoln's execution now just a day away, Michael looks for a way to get him out of solitary confinement in time for an escape. Meanwhile, Veronica comes out of hiding and gains an ally.

Detective Lindsay calls in suspects in the disappearance of Katie's kidnapper, Jones struggles to fit in, and Herrmann celebrates his 20th wedding anniversary.

Boden tries to keep the firehouse from closing, the romance between Dawson and Casey grows, Cruz worries about his brother's safety, and Severide and Katie make up for lost time.

House 51 comes under investigation for negligence after interim chief Pridgen makes a grave tactical error during an apartment fire.

Burgess and Atwater come across a gunshot victim and the only witness is Olinsky's daughter, and Ruzek goes to Burgess for help with an undercover mission.