Andy is finding Theo a challenge. A man is found dead in a hotel bath-tub, minus a part of his anatomy and some personal effects. A mother brings her son into the house because she thinks he's been stealing.
A young boy is suspected of killing his mother's boyfriend; Fancy realizes that Lt. Abner is severely depressed. Sipowicz has a date with a niece of a friend as a favor; Katie becomes upset at this news.
Andy and Danny reopen an unsolved murder when the body of a small child is found buried within a wall; Medavoy and Jones deal with the owner of a dog who has a bullet in his nose they need as evidence in their case.
The detectives accept the help of a pair of British policeman catch a rapist-murdered who has emigrated from England to NY. Meanwhile, Jones becomes close with a reporter he met during a previous case.
Andy goes into a tailspin when a doctor's visit reveals that Theo may have cancer. Diane and Jill's relationship suffers when info about Jill's ex-husband surfaces. Andy and Danny ponder the impact on Jill's career.
IAB is closing in on Jill. Jill explains the leverage Don has over her. Andy stays by Theo's side as he undergoes tests to determine if he has cancer. Changes are made in the department as fallout over Jill's ex-husband.