Episode 4

Sandi Toksvig, Alan Davies and comedy stars swap even more funny facts on every subject under the sun. It doesn't matter if they're right, as long as they're quite interesting.

Sandi Toksvig, Alan Davies and a host of comedy stars swap funny facts on every subject under the sun. It doesn't matter if they're right, as long as they're quite interesting.

When Calls the Heart is inspired by Janette Oke's bestselling book series about the Canadian West, the series tells the captivating story of Elizabeth Thatcher, a young teacher accustomed to her high society life, who receives her first classroom assignment in Coal Valley, a small coal mining town where life is simple, but often fraught with challenges. Upon arrival, Elizabeth befriends Abigail Stanton, a wife and mother whose husband, the foreman of the mine, along with a dozen other miners, has just been killed in an explosion. The newly widowed women find their faith is tested when they must go to work in the mines to keep a roof over their heads. Set against the wild canvas of a 19th century coal town, Elizabeth will have to learn the ways of the frontier if she wishes to thrive in the rural west on her own.

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.