Iron Chef was a Japanese show that ran from 1993 to 1999. The premise for the show was that the "Chairman of the Gourmet Academy" set up a "Kitchen Stadium" where he would invite chefs from around the world to compete against one of his Iron Chefs. They'd be given 1 hour each to prepare four dishes, which would then be scored by a panel of judges (usually a combination of culinary experts and celebrities.) However, there was always a "secret" ingredient that would only be revealed at the start of the battle, and had to be incorporated into each dish. During the course of the show, there were 7 Iron Chefs: Three representing Japanese dishes, two French and one each Chinese and Italian.
The show was a big hit in Japan, but it was also a surprise hit in the US, where it was dubbed in English. So much so that Food Network started their own version of the show: Iron Chef America. In ICA, five dishes were required and the scoring system was slightly different.
In reality, the secret ingredient was only partially secret. The chefs were given some idea what they would be working with so they could do some advance planning. Also, they would be supplied other ingredients appropriate to the theme. Also, the chefs only had to finish one dish of each of the four courses before time ran out. The others could be plated later. And the Chairman's famous line "Allez Cuisine" is a bad French translation of "Go cook!"
A new Iron Chef show just recently started last year in Japan, with three new Iron Chefs. There are also Israeli, UK, Thai, Australian, Vietnamese and Indonesian versions of the show.
I wanted to find a video of one of the Masaharu Morimoto vs Bobby Flay battles, but strangely enough I couldn't find any complete episodes.