The final designers are on pins and needles as the winning contestant is revealed in the conclusion of the Season 5 finale. Tim Gunn serves as the guest judge. 

The series begins to sew up its fifth season with Part 1 of the two-part finale, in which the remaining contestants prepare to showcase their designs at New York's Fashion Week. 

In a nature-themed undertaking, the remaining designers take a jaunt to the great outdoors to draw inspiration. But will they see the forest for the trees? 

Rapper-actor LL Cool J is on hand as the guest judge when the designers try to hit all the right notes in a music-themed challenge. 

The contestants fashion clothes for college women, helping them make a smooth transition from cool-school style to working-world sophistication. Designer Cynthia Rowley is the guest judge. 

The designers reach for the stars when they create clothes based on astrological signs. Designer Francisco Costa is the guest judge. 

The designers must create looks inspired by fashion icon and guest judge Diane von Furstenberg's fall line. The contestants must also base their creations on the 1948 film "A Foreign Affair." Fashion figure Fern Mallis serves as guest judge. 

The designers create clothes using various car parts. Stylist Rachel Zoe and Season 3 contestant Laura Bennett serve as guest judges. 

RuPaul is the guest judge in a challenge that tasks the designers to create flamboyant attire for drag queens. 

Brooke Shields is the guest judge in a challenge that requires the designers to create a day-to-night look for professional women. 

The designers must create a sports-themed outfit. Olympic speed skater Apolo Anton Ohno is the guest judge. 

The sights, sounds and styles of New York City serve as the designers' inspiration. Sandra Bernhard is the guest judge. 

The contestants are forced to expand and purify their thinking by "going green" with the help of their models.

The 16 new designers are introduced and their first challenge: making clothing out of unusual sources.