On this week's Person of Interest...

A 911 emergency operator receives a call demanding a series of phone calls be deleted or a boy dies.

Fusco, who helps out a rookie detective, solves a murder case that is trying to be covered up by a gun for hire. That hire is the voice telling the 911 operator what to do.

Finch is able to help on-site, while Reese and Shaw rescue the boy before a bomb goes off.

The caller lets Finch know he’ll be back.