All Her Fault

Marissa Irvine arrives to collect her young son Milo from his first playdate, but the woman who answers the door isn't a mother she recognises; she doesn't have Milo.

As Detective Alcaras investigates Milo's disappearance, Marissa, with Jenny's help, works hard to raise awareness; a press conference turns ugly.

Alcaras turns his attention to the recent Chicago marathon, attended by Carrie, the Irvines, and a potential new suspect; a canvassing event aims to keep the case alive.

Alcaraz struggles to balance work and home life and must make a difficult choice when he's tempted by an offer; the police struggle to connect the mystery marathon man with Carrie and Milo.

News from Alcaras concerning Carrie's hideout throws suspicion on all of the Irvines; Brian begins to uncover a betrayal from Peter, who accuses Lia of lying.