Bourdain appeared five times as guest judge on Bravo's Top Chef reality cooking competition program: first in the November 2006 "Thanksgiving" episode of Season 2, and again in June 2007 in the first episode of Season 3, judging the "exotic surf and turf" competition that featured ingredients including abalone, alligator, black chicken, geoduck and eel. His third appearance was also in Season 3, as an expert on air travel, judging the competitors' airplane meals. He also wrote weekly blog commentaries for many of the Season 3 episodes, filling in as a guest blogger while Top Chef judge Tom Colicchio was busy opening a new restaurant. He next appeared as a guest judge for the opening episode of Season 4, in which pairs of chefs competed head-to-head in the preparation of various classic dishes, and again in the Season 4 Restaurant Wars episode, temporarily taking the place of head judge Tom Colicchio, who was at a charity event. He was also one of the main judges on Top Chef All-Stars (Top Chef, Season 8). He made a guest appearance on the August 6, 2007 New York City episode of Bizarre Foods with Andrew Zimmern, and Zimmern himself appeared as a guest on the New York City episode of Bourdain's No Reservations airing the same day. On October 20, 2008 Bourdain hosted a special, At the Table with Anthony Bourdain, on the Travel Channel.