Whenever something bad happens, the police instantly show up.
Do We Have This Already? Needs a Better Description. There's trouble in Tropeland! A bad guy's around, but luckily the police are there to help...Even if there was no time to call them. For some reason they knew what was going on and when to show up. A common manifestation of this trope is when you don't actually see the police, but hear the sirens of the police cars. Despite this, if the police aren't effectual, this can fall into Police Are Useless.