
Before hosting Discovery's "Dirty Jobs," Mike Rowe had a program in San Francisco about folks on a mission -- mad scientists, eccentric collectors, devoted do-gooders -- called "Somebody's Gotta Do It." Now, CNN gives Rowe free rein to scour the country for people who, he says, "do what they do because of a weird mix of love, compulsion, obsession, dedication -- whatever it is. Those people have always interested me." The former series focused on the task, but this version spotlights the personality. Or, as he puts it: "More mission, less poop."

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Mike visits and performs maintenance on the Out n About Treehouse Treesort, a resort consisting entirely of rooms in trees; Mike meets a man who turned a decommissioned 727 airliner into his home.
In the forest of Azalea, Oregon, Mike joins two arborists on a quest to measure the world's largest chinkapin tree, which is over 100 feet tall; Mike meets formerly homeless Manuel Cisneros, who turned his life around by creating gravity-defying art.
Mike joins Chief Mammal Preparator at Chicago's Field Museum to dissect and stuff squirrels for future generations to study; Mike feeds and cares for penguins in Baltimore Zoo.
Mike becomes a bicycle cabbie for Ali Horuz, a Turkish immigrant who turned $500 into a bike-taxi, moving billboard, fabrication and advertising agency company; Mike tours the Lunchbox Museum and learns everything about the collectible metal boxes.