All-Star Cast: Season 8 — Top Chef: All-Stars, which brought back 18 chefs across all seven seasons for one more shot at the title.
Hey, It's That Guy!: Chef Nyesha Arrington from the Texas season won her current job as Wilshire's executive chef on Food Network's Chef Hunter. Season 9 began airing on Bravo weeks before Food Network's short-lived Chef Hunter, making Nyesa's episode a Foregone Conclusion.
Before competing in their respective seasons, Ed Cotton (Season 7) and Richard Blais (Season 4 and 8) both served as sous chefs to Iron Chef Cat Cora. Ashley (Season 6) has been serving as sous chef for Iron Chef Alex Guarnaschelli.
The Pete Best: Katie Lee was the hostess of season one of Top Chef before being replaced by Padma Lakshmi. Katie was brought back as a guest judge in All-Stars.
Kelly Choi hosted the first two seasons of Masters before being replaced by Curtis Stone, who is incidentally the first male host of any of the shows.
For Top Chef Canada, Season 1 hostess Thea Andrews was replaced for season 2 by Canadian actress and former model, Lisa Ray. Though in this case, it was because Thea was pregnant, as shown when she guest hosted for the third episode of season two.