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From roots in the Deep South to the slums of New Jersey, "Who Do You Think You Are?" follows the journeys of some of the most well-known names in American popular culture. Watch as celebrities discover unknown details about themselves and their families while researching their ancestry with the help of historians and genealogical experts.

Intrepid adventurer Michael Palin takes a journey through the Himalayas.

Michael Palin travels to 18 countries around the rim of the Pacific Ocean.

Michael Palin attempts to copy the exploits of fictional character Phileas Fogg, by trying to travel around the world (without flying) in 80 days.

Michael Palin undertakes an epic journey of 23,000 miles, traveling from the North to the South Pole across 17 countries with a minimum of air travel, all on a tight deadline.

Now Karl’s turned 40 and has officially hit middle age, it’s time for him to re-assess his life. He’s not married, he doesn’t have kids, he’s got a job where he’s known as an ‘idiot’, and he’s known for being miserable. He’s classic ‘mid-life crisis’ material. As Karl attempts to put his life in order, he’ll be dispatched around the world on a crash course to find out how other cultures deal with life’s big questions. The ups and downs of Karl’s experiences will be contrasted against the beautiful geography of the countries he visits, captured on HD with stunning aerial photography.