It’s a shakeup! In a promo for next week’s episode, show mentor Tim Gunn is “stunned” when a designer walks away from the competition for the first time in Project Runway history. Think you know who it is? If that’s not dramatic enough, the promo also reveals that producers will bring an eliminated contestant back to the workroom. As images of Ping, Anthony and Jesse flash on the screen, the voiceover says, “Now, one of these former designers returns to shake up the entire competition.” Who will it be? Who should it be? Project Runway airs Thursday on (10 p.m. EST) Lifetime.