Nature - Season 31

District 21 of the Chicago Police Department is made up of two distinctly different groups. There are the uniformed cops who patrol the beat and go head to head with the city's street crimes. And there's the Intelligence Unit, the team that combats the city's major offenses - organized crime, drug trafficking, high profile murders and beyond. These are their stories.

No job is more stressful, dangerous or exhilarating than those of the Firefighters, Rescue Squad and Paramedics of Chicago Firehouse 51. These are the courageous men and women who forge headfirst into danger when everyone else is running the other way and whose actions make the difference between life and death. These are their stories.

High Potential follows Morgan, a single mom with an exceptional mind, whose unconventional knack for solving crimes leads to an unusual and unstoppable partnership with a by-the-book seasoned detective.

Famous for his dark humour, one-liners and THAT laugh, Jimmy Carr challenges 10 of Britain's funniest comics to spend the day together without so much as a titter. The rules are simple: laugh and you're out. Over the course of the series, they will use every ounce of their comedic talents to try and break their opponents - without cracking up themselves. And it's not just their rivals they need to watch out for. The series is packed with comedy cameos, format twists and surprises designed to lure laughs from both the players and the viewers. It's a stellar line up of British comedy talent as you've never seen them before, but who will be crowned the inaugural winner of Last One Laughing UK?

9-1-1 is a fast-paced exploration into the lives and careers of first responders – cops, paramedics, firefighters – the people who put their lives on the line to save others.