Guy at theme park they slap his kid and he snaps

A mysterious man sits in the booth at the end who people make a deal with to get what they want. They do the task or they don't - that is up to them, but there are no rule changes.

Falling Skies opens in the chaotic aftermath of an alien attack that has left most of the world completely incapacitated. In the six months since the initial invasion, the few survivors have banded together outside major cities to begin the difficult task of fighting back. Each day is a test of survival as citizen soldiers work to protect the people in their care while also engaging in an insurgency campaign against the occupying alien force.