* AllStarCast: Season 8 -- ''Top Chef: All-Stars'', which brought back 18 chefs across all seven seasons for one more shot at the title.
* ThePeteBest: 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.
* RomanceOnTheSet: Hosea and Leah in Season 5.