John Oliver discusses the massive problems caused by gang databases, how people wind up on them, and why nobody looks good in lime green.

John Oliver discusses the Trump administration's promise to deport one million immigrants, what the follow through on that promise looks like in practice, what the actual rules are about masked police arresting civilians across the country, and some stuff about filmmaker Dean Cain. It's ok, you can Google him, we don't expect you to recognize the name.