Lost star Matthew Fox would be no good on a real desert island - he's a poor swimmer who's terrified of water.
The actor, who plays heroic Jack Shephard on the hit drama, admits his wife Margherita had to teach him to swim - and he still fears the show's water-based scenes.
He explains, "Growing up (in Wyoming) I didn't have the opportunity to spend a lot of time in the water. The water in Wyoming is so f**king cold that we got into the habit of jumping into a river or lake and then just jumping right out.
"I think I have a natural fear of water. I've never been comfortable, even now that I know how to swim... I get anxious. I'm just not a very good swimmer."