The pair previously teamed up to compete in the Atlantic Rowing Race
TV presenter Ben Fogle and Olympic gold medallist James Cracknell have launched a search to find someone to join them on a race to the South Pole.
"Applicants should be prepared to endure isolation, deprivation and danger," Fogle said.
Prospective companions will be grilled by psychologists, researchers, scientists and Royal Marines to test their suitability.
The pair will begin the 2008 Amundsen South Pole Race in December.
'Lots of exercise'
"They will need to be able to live in a small three-man tent, share daily duties and chores including man-hauling, navigating and cooking, and be capable of walking for up to 20 hours a day over snow, ice and crevasses," Fogle added.
Fogle, 34, and Cracknell, 36, will train for three months in Austria before competing against nine other teams from around the globe across the world's largest ice cap.
The 420-mile race will be the first at the South Pole since Robert Scott and Roald Amundsen's struggle over the frozen landscape almost 100 years ago.
Fogle said he was preparing with "lots and lots of exercise," adding: "It's taken over my life. If you mess with the South Pole you won't be coming back."
Those interested in applying can visit cometothepole.com.
The pair previously teamed up in 2005 to compete in the Atlantic Rowing Race from the Canary Islands to Antigua where they finished in fourth place.