Three mental health experts look at 10 volunteers taking part in various challenges before trying to decide which of them has a history of mental health problems.

The experts discover if they were right if the people that they chose who had suffered with mental health problems.

Jimmy Doherty attempts to discover whether GM foods can really feed the whole planet. He also tries to find out whether GM manufactured foods are safe.

Brian Cox examines the history of time and visits the ancient Mayan pyramids in Mexico where the Maya built temples to time.

The series examines why in the last 50 years more and more people are becoming affected by different allergies.

Danny Wallace tries to find the best robot made in the world that could be a companion.