The Gateway is that much needed crime drama that we've been thirsty for, but doesn't seem to come that often. It works because it's teeth are firmly sunk into the characters, and more than capably led by the highly underrated Shea Whigham.
The main character Parker (Whigham) works well because he's down on his luck; a washed up social worker trying to turn the tables and do something meaningful by protecting the most innocent, the children. Whigham handles the role wonderfully with seasoned chops.
Olivia Munn makes a mark as well by delivering depth to a character that otherwise could come off as stock.