Riot Control

Riot Control are police and military forces deployed to protests and riots for the goal of stopping civil unrest. They usually use non lethal gear such as beanbags, tear gas, or mace, although lethal force is sometimes required in larger riots.

In the episode Baseball, a riot triggered by The Counterfeit Ticket Dealer, and...well, Dan, leads to the Riot Control storming onto the site, mass deploying tear gas to quash the riot. Dan was unaffected, as he is immune to tear gas, mace, and pepper spray.