Letterman's newest TV gig is a documentary series on National Geographic

Letterman's Newest TV Gig Is a Documentary Series on Nat Geo

Forget the stereotypical condo in Florida. David Letterman, who retired from "The Late Show" a few months ago, is -- you guessed it -- returning to TV.

The former host isn't going where you'd expect -- his next project is a documentary series on ... National Geographic.

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Letterman will explore the issue of climate change for the documentary series "Years of Living Dangerously."

Letterman will be heading to India, where the nation is trying to bring solar power to everyone within the next decade.

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Letterman's newest TV gig is a documentary series on National Geographic
NEW YORK, UNITED STATES: US Vice President and Democratic presidential candidate Al Gore (R) with talk show host David Letterman 14 September, 2000 after the taping of Letterman's show at the Sullivan Theater in New York City. AFP PHOTO/ Luke FRAZZA (Photo credit should read LUKE FRAZZA/AFP/Getty Images)
NEW YORK, UNITED STATES: Republican presidental candidate and Texas Governor George W. Bush (L) poses for photographers with David Letterman after concluding taping of the 19 October 2000 Late Show with David Letterman in New York. Bush read the Top Ten list poking fun at what he might do if elected. AFP Photo by Paul J. RICHARDS (Photo credit should read PAUL J. RICHARDS/AFP/Getty Images)
BAGHDAD, IRAQ - DECEMBER 24: In this handout photo provided by the U.S. Air Force, 'Late Show' television host David Letterman entertains soldiers at the Coalition Provisional Authority headquarters December 24, 2003 in Baghdad, Iraq. (Photo by Reynaldo Ramon/U.S. Air Force via Getty Images)
NEW YORK - MAY 7: Tina Fey takes off her dress after her last appearance on the CBS Late Show with David Letterman, Thursday May 7, 2015 on the CBS Television Network (Photo by John Paul Filo/CBS via Getty Images)

It's not a solo gig, though. Other hosts include Jack Black, Olivia Munn and Arnold Schwarzenegger.

It's the second season of the series, which aired on Showtime last year.

The show also won an Emmy in 2014.

Variety notes one of the series' producers noticed Letterman perked up when discussing climate change on "The Late Show." The producer said, "He's definitely invested in this issue."

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