The bear suit was one of the very first episodes. It involved him hearing the "bear", causing him to make the decision that he'd better run for it through a forest of trees in the pitch black of night. The episode as shown did not show the guy in the bear suit (probably because it looked fake even to the producers). The story is that the crew tried to get a real trained bear but that fell through at the last minute, so they dressed a crew member up in a suit for the shot.

BTW, this was also the episode where he jumps into a river to "elude the bear" and you can see that he's wearing a life vest under his shirt.

If you want to see all the wool this show has pulled over viewers eyes, check out BearWiki.

This guy's show is going to get someone killed. Unfortunately, a lot of people think it's entertaining - in the same way that "Fear Factor" is. We're watching it to see what other disgusting things Grylls will do in the name of TV. Pretty hard to top drinking elephant dung juice, though. That was even worse than drinking his own urine.

What they need is a disclaimer like The Psychic Network (remember that one?) "For Entertainment Only".