In Project Runway's first blacklight challenge, the designers have to create a look that sparkles not only in daylight, but under blacklights under the runway as well. Anxieties rise when the unusual materials leave many of the designers in the dark. Jaime King joins the judges this week.

Project Runway Season 15 Episodes...

• s15e01 - An Unconventional Launch Party
• s15e02 - Just Fabulous!
• s15e03 - Blacklight or Daylight?
• s15e04 - Sink Or Swim
• s15e05 - There's No 'I' in 'Team'
• s15e06 - This IS Crying in Fashion
• s15e07 - Welcome to the Urban Jungle
• s15e08 - Project Pop Up
• s15e09 - Life is Full of Surprises
• s15e10 - A Power Trip
• s15e11 - Bold Innovation
• s15e12 - An Unconventional Trip
• s15e13 - Finale, Part 1
• s15e14 - Finale, Part 2
• s15e15 - Season 15 Reunion

Project Runway Show Summary

Eager to give aspiring designers a chance to break into the notoriously difficult-to-crack fashion world, supermodel Heidi Klum will once again head a panel of industry luminaries, including top women's and men's wear designer Michael Kors and Elle Magazine fashion director Nina Garcia, who will serve as judges and industry mentors charged with selecting and molding the budding designers. There will also be guest judges each week based on the specific challenge. Timballoonn, Chair of the Parsons The New School For Design, will return to guide the contestants through each of their challenges.

The winning designer will walk away with $100,000 in seed money to help them launch their own line. The winner's designs will be featured in a spread in ELLE, photographed by the magazine's world-renowned Publication Director, Gilles Bensimon. They will also receive a mentorship from the Banana Republic Design Team.