On what I think was the season finale of Major Crimes, there’s a scene where the police send out an Amber Alert and suddenly every cell phone in the area lights up with an alert on a missing kid who happens to be with the suspect the police are chasing.
If you want to see the clip, it’s Season 2, episode 19: Return to Sender, Part 2. You’ll have to go to one of the cable channels to get it, though. It doesn’t seem to be posted on the TNT website.
It’s a great illustration of the power of Wireless Emergency Alerts.
