Christopher Innvar

Elizabeth wants a Bahraini diplomat prosecuted after he is caught holding a maid hostage; Henry's father visits.

The success of a US-France state dinner is in jeopardy when a CIA operative is captured by French intelligence.

Alicia and Diane represent the parents of a student who died during a hazing ritual at a party for the college water polo team. They argue that the college authorities knew what was going on but didn't do enough to prevent it. However, they are forced to rethink their approach when the opposing lawyer abruptly changes tactics, asserting that the death was the result of a hate crime.

As Kitty searches for a teenage runaway, Sherlock and Watson investigate the murder of a brilliant bioengineer, Joan makes a decision that she fears will impact Sherlock negatively.

While responding to a call, Dawson accidentally hits a pedestrian who steps out in front of the ambulance, and must deal with the repercussions.

The situation turns dire when members of Firehouse 51 are split up and reassigned, while Severide toils over an important decision.