Donovan's retired policeman father, Gene, returns to town for heart surgery, having not even told his son that he had had a heart attack. Gene Donovan is disgusted and angry when his son admits that he was an informant for the hated Internal Affairs. However, Gene is ultimately forced to learn why Francis Donovan was forced to agree to work for the so-called "rat squad": to save Gene from an indictment for corruption by IAB. Eventually, the sympathetic Officer MacElwaine sticks up for Donovan in front of rest of the officers still ostracizing him for being an informant for IAB. Meanwhile, Nona helps a young prostitute who's in custody when she realizes that the woman, although denying it, has a unsupervised infant at home. Nona then goes undercover as a prostitute, eliciting a number of comments about the way she looks from her colleagues. Also, Roussakoff has trouble staying awake during his shift after working nights as a security guard at a mortuary so that he can buy his mother a ...