In Season 5 Episode 9 of Person of Interest, Reese was following Terry Easton, a locksmith, as he had received his number.
He finds him with an active bomb and takes him to the precinct. At the same time, Amir was captured and was kept at the precinct.
Easton reveals that his wife has been kidnapped by the mastermind "Voice", at the same time a lot of bomb threats come in.
Later, it is revealed that this is all an elaborate plan to kill Amir as Terry Easton is actually "Voice".
But if Terry's life was never in danger, then why did the Machine send his number?