Tim Hopper

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

The case of a 17-year-old rape victim (guest star Jenna Miller) takes a strange turn when her immediate family tries to keep the scandal quiet while they prepare a lawsuit.

A family is torn apart by sexual abuse -- The police are brought into family abuse allegations when Robin Winnock (guest star Dana Eskelson) believes her young son Jake (guest star Jack Vignone) was molested by her husband, currently serving time for molesting Jake's older brother Teddy. Through DNA, Medical Examiner Warner (Tamara Tunie) clears the father, Gregory Hensal (guest star Tim Hopper) but implicates Teddy as the abuser who has been running a highly profitable porn site catering to male pedophiles. The detective's investigations bring them to the computer crime division of the department now staffed by Det. Olivia Benson (Mariska Hargitay) and TARU Tech Morales (Joel De la Fuente), who are both enlisted to help. Guest star Kate Mulgrew plays Assistant US Attorney Donna Geysen. Chris Meloni, Ice-T, Richard Belzer, Dann Florek, B.D. Wong and Diane Neal also star.

Firehouse 51 is forced to share its space with Firehouse 17. Kidd and Herrmann fight over Ritter. An arson case tests Kidd and Severide's relationship. Firehouse 51 says goodbye to one of its own.

Izzie faces her past and finds comfort in George, while Alex becomes more attached to Jane Doe (Elizabeth Reaser), Meredith and Derek question their own status, and Cristina resolves to fight for her relationship with Burke -- despite her past with Colin Marlow (Roger Rees).