Tim Hopper

Cruz's past comes back to haunt him; Severide prepares to teach an arson class at the academy; Mouch searches for a victim's next of kin.

Severide and Van Meter investigate a fire at a family-owned restaurant; Pascal questions Kidd's leadership.

Izzie faces her past and finds comfort in George; Alex has an attachment to Jane Doe; Meredith and Derek question their status; Cristina resolves to fight for her relationship with Burke.

On the drive home from a family meal with Linda and the children, Danny's car hits a man who had run into the road in front of him. As Danny seeks to help the victim, shots are fired out of nowhere, and Linda feels that, compared to the NYPD, she's constantly an afterthought.

While looking into the case of a young molestation victim, Stabler and Tutuola stumble upon an online paedophile ring.

Kidd recruits Carver, Capp and Tony to help prepare her new lieutenant's quarters; Severide and Det. Pryma reluctantly pair up to work a police investigation; Firehouse 51 comes together to fight a movie theatre fire.