Jake Gyllenhaal Eats a Worm on Man Vs. Wild

07/07/2011 AT 07:00 AM EDT

He's lived inside a bubble, confronted an intergalactic bunny and even herded sheep in Wyoming backcountry. But as Bear Grylls's companion on Man vs. Wild, Jake Gyllenhaal is out of his element like never before.

In an exclusive first-look at the season premiere of the Discovery Channel show, guest star Gyllenhaal joins outdoorsman Grylls on a two-day trek across Iceland. Traversing terrain dominated by mountains, glaciers and icy waters, the duo copes with some of the worst conditions known to man, all in the name of adventure.

As Grylls, 37, forages for food before crossing a frigid river, Gyllenhaal, 30, looks on with bemusement, even proclaiming an edible root – a Viking delicacy, according to Grylls – "tasty." And then he is presented with the main course: a worm.

Gyllenhaal will eat his way across Iceland on the season premiere of Man vs. Wild, Monday, July 11, at 9 p.m. ET, on Discovery Channel.
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