Tim Gunn looks disapprovingly at a contestant's fabric choices on 'Project Runway.'
Mike Yarish/Lifetime Networks

This look on the face of Project Runway mentor Tim Gunn is not good news for this season six designer.

After a very long wait, Project Runway — which, remember, has left Bravo for Lifetime — returns with its sixth season tonight. Season five ended in October 2008, so there's a lot of pent-up enthusiasm among people who are fans of the show, and nothing feeds pent-up enthusiasm like a little taste of the marvelously warm and funny Tim Gunn. Gunn is the show's teacher, mentor, skeptical-frowner, and source of a hearty cry of "Rally!" when a harried contestant really needs it.

Last night, he dropped by The Daily Show, where Jon Stewart chatted him up about what makes Runway so good, what the show's relocation to Los Angeles from New York has meant, and the fact that Gunn is about to show up in a Marvel comic.

The video, after the jump...