Eight all-star Rookies and eight returning all-star Veterans battle to create cohesive collections in the biggest season in All Stars’ history.

Designers tear, dye and burn to create distressed fashion for a post-apocalyptic runway. Danielle Brooks guests.

Designers pair up to create fashion inspired by food and wine pairings. Whoopi Goldberg joins the judges for All Stars’ first ever double elimination.

In the notorious unconventional challenge, designers use all types of balls to create modern day “ball gowns.” Kacey Musgraves guests.

Designers create looks to celebrate a woman’s inner superhero. Supermodel Karolina Kurkova guests.

Betty Boop joins Alyssa on the runway to challenge the designers to create young, chic Hollywood looks. Rebecca Minkoff guests.

RuPaul and Jesse Tyler Ferguson join the judging panel for a spectacular avant-garde runway.

Isaac Mizrahi’s exhibit serves as inspiration for colorful party looks. Legendary supermodel Carmen Dell’Orefice is a guest judge.

Zac Posen invites the designers into his personal studio to gather material for red carpet looks that showcase a signature technique. Zac Posen and Rosie Perez guest judge.

Designers face off against one another to create performance wear for a music superstar. Olivia Culpo guests.

Nina Garcia challenges the designers to create resort wear inspired by different Candy Crush lands. Nina Garcia and Kelly Osborne guest judge.

At the Smithsonian in Washington, DC, designers are challenged to create 6-piece collections. A surprise runway sends one designer home early. Dita Von Teese guests.

The designers must tap into their past to create a look inspired by a moment that kick-started their fashion career.

An "opposites attract" theme tasks the designers to create red-carpet gowns for the Academy of Country Music Awards. Appearing: the country group Little Big Town.

The Unconventional Challenge finds the designers turning New York City emergency services materials into runway-worthy looks.

A challenge features a naked runway and centers on naturists who need winter wear to stay warm.

A star of Broadway's "Finding Neverland" challenges the designers to re-imagine looks for classic fairy-tale characters.

Fashion designer Zac Posen and actress Debi Mazer join the judges to critique sophisticated summer looks with an edge.

Four surprise guests return to advise the designers as they create print-on-print looks for Nina Garcia; two designers battle to make the finale.

Fourteen designers return for the season; the designers create collections inspired by new York's uptown or downtown scene.

The designers must create feminine looks from the masculine materials at a construction site in an unconventional challenge.

With exclusive access to the Broadway musical, "Wicked," the designers compete to create couture inspired fashion.

The designers must create colorful party dresses inspired by their personal relationships.

The clothiers meet British royalty in London as inspiration to create winter fashions. Guest judge: Debra Messing

The stakes are high as the designers roll the dice on the runway for a fashion gamble.

The designers must create looks for Match.com singles to wear on first dates.

The designers must create elegant resort wear with swimsuits, but first they must collect their fabric from under the water.

The designers must use marine life as inspiration for avant-garde fashion; one designer doubles the budget by swimming with sharks.

Alyssa and the judges take over Times Square to educate the designers in the business of fashion for a QVC separates challenge.

The designers must use Marchesa's showroom as inspiration to create bridesmaids' dresses.

Marilyn Monroe's timeless beauty inspires the designs of red carpet gowns; a Hollywood legend visits the workroom.

The finalists design collections representing the four seasons of the year; the winner is chosen.

Alyssa Milano reunites all 14 designers to debate the fashion, fights, and turmoil from this season; moments and drama from inside the workroom; the designers give updates and answer viewers' questions.

The competition is tougher than ever as three winners of Project Runway return to defend their titles. The task at hand--to create a fashion-forward punk look inspired and judged by punk rock icon Debbie Harry of Blondie.

At the American Museum of Natural History, creepy crawly arachnids and insects serve as inspiration for the designers to create an avant-garde look. Guest judges are Project Runway season 9 winner, Anya Ayoung Chee, and jewelry designer Jennifer Meyer.

Signature cocktails at Jay Z's legendary 40/40 Club stir up ideas for runway worthy cocktail dresses. Guest judges are interior designer Nate Berkus and designer Rebecca Minkoff.

It's back to school for the remaining eight designers in this fan-favorite unconventional challenge to create high impact fashion from materials found in an elementary school classroom. Guest judges are actors Michael Urie and Gabourey Sidibe.

The designers pair up to create young modern looks inspired by the 1930s and Lifetime's new mini-series "Bonnie & Clyde." Guest judges are Austin Scarlett, designer Elie Tahari, and supermodel Bar Refaeli.

America's favorite housewife, Marge Simpson, turns to the All Stars to design a date night dress for an exciting evening out on the town with Homer. Guest judges Anthony Ryan Auld, designer Stacey Bendet and actress Abigail Breslin help to determine whose dress Marge will wear on a future episode of "The Simpsons".

Six remaining designers are whisked away by helicopter to QVC's headquarters in Pennsylvania where they're challenged to design a stunning red carpet gown. Mondo Guerra, QVC's Lisa Robertson, and actress Elisabeth Moss are guest judges.

Project Runway goes global as the designers team up with some of the most influential fashion bloggers in the world to identify a new trend for 2014. Guest judges are Nina Garcia, Christian Siriano and Calvin Klein's Francisco Costa.

Fashion and commerce collide as the All Stars work with design house Milly to create ready-to-wear looks to be sold for charity and the designers face a shocking twist on the runway. Guest judges are Kristin Chenoweth, Nick Cannon and Milly Designer Michelle Smith.

In the Season Finale, designers present collections inspired by their own heritage at a VIP runway show at the world headquarters of the United Nations. Project Runway's Zac Posen and guest judge Gayle King help to crown the winner.

13 of Project Runway's most creative and contentious designers return for a second chance at the biggest prize ever. In the season's first team challenge, the designers flaunt their fashion attitudes in more ways than one. New host, supermodel Carolyn Murphy, joins mentor Joanna Cole and judges Isaac Mizrahi and Georgina Chapman for this season, guest judged by previous All Stars winner Mondo.

The All Stars are tasked with recreating and updating a 70's disco style using Nine West shoes of their choosing as inspiration! Designer Rafe Totengco guest judges.

Graffiti artists help the designers tag their fabric with spray paint from which they must create wearable art. Designers Robert Tagliapietra and Jeffrey Costello serve as guest judges.

Social media and fashion collide when the All Stars must draw inspiration for their runway designs from images sent to them by readers of USA Today. Guest judges are designer Charlotte Ronson and fashion blogging sensation Tavi Gevinson.

The designers create edgy, androgynous apparel in a challenge that comes with a twist. Guest judges: Jason Wu and Robert Rodriguez.

The All Stars gather at NYC's Highline and are challenged to create a red carpet gown using only green, eco-friendly fabrics and materials. The legendary Diane von Fürstenberg guest judges.

The seven remaining designers play naughty or nice in the fan-favourite unconventional challenge that brings them to a Christmas décor emporium. The designers will have to impress guest judges singer Kylie Minogue and television personality LaLa Anthony.

The final six All Stars are tasked with designing a look for one of three vintage 1920's events. To make matters worse, they must face off against each other in pairs of two in this season's Fashion Face Off! Actress Gretchen Mol and designer Jenny Packham serve as guest judges.

High Fashion meets a Retail Budget! The five remaining All Stars must create a ready to wear look with a "wow factor," while also meeting a retail budget. With Elie Tahari as this week's guest judge and mentor, the designers all compete for the chance to have their design manufactured, featured and sold in Elie Tahari's stores and online! Stacy Kiebler also guest judges.

The Project Runway designers pay their tribute to the armed forces! The four remaining designers are paired with four female veterans from an array of different military branches. The designers will have to battle it out to see who can create a design that best suits each veteran for each of the special events they are attending. Special guest judges for this episode include actress Katie Holmes and designer Carmen Marc Valvo.

The designers go international! For the first time ever in Project Runway history, the designers retire sketching at 1407 for a day of sketching in Paris at the Eiffel tower! The designers also get a once-in-a-lifetime opportunity to tour Valentino atelier and showrooms, and are also invited to a private preview of Valentino's Couture show. With all of their newly acquired Parisian knowledge, the designers return to NYC to design a couture gown of their own that will hopefully secure their spot in the finale! Guest judges to determine who goes to the finale are House of Valentino and Cynthia Rowley.

The three remaining designers compete in the final for a chance to win a life-altering grand prize! However, because this is All Stars, the final three designers only get four days and an hour and a half at Mood, to complete a full mini collection. With the help of previously eliminated designers, the final three duke it out and give it all they've got to prove who Project Runway's true All Star is. Who will win the biggest prize in Project Runway history? Stay tuned to find out! Actress Liv Tyler and designer Marherita Missoni serve as the guest judges.

13 of Project Runway's most talented and controversial designers return for a second chance at victory. New host supermodel Angela Lindvall reveals an All Stars twist to what all designers love to hate -- the unconventional challenge! The All Stars are greeted by a new mentor, Marie Claire's Joanna Coles before facing new judges Georgina Chapman and Isaac Mizrahi.

The All Stars have just 24 hours to create glamorous ball gowns for a night at the Opera. Guest judges are kings of the red carpet, fashion duo Mark Badgley and James Mischka.

Miss Piggy takes charge as client and guest judge when the All Stars create a cocktail dress for the Muppets' most demanding diva. Will the designers live up to the high standards of this international fashion icon?

Fashion icon Diane Von Furstenberg joins Angela on the Runway to reveal the fastest challenge in Runway history. It's a race against time as the top ten All Stars have only six hours to create a colorful look for supermodel Miranda Kerr.

The All Stars take to the streets of New York to convince total strangers to part with their clothes in the name of fashion. Their muse's outfits are ripped apart and reborn in the hands of an All Star.

The eight remaining All Stars compete head to head fin a sportswear challenge for one of the four seasons. Guest judge Cynthia Rowley.

It's all about Broadway baby, when the designers compete for their Broadway debut. The award winning composer of "Wicked" Stephen Schwartz, challenges the All Stars to design an outfit for the Broadway musical "Godspell."

At the prestigious United Nations headquarters, Angela challenges the All Stars to choose flags as an inspiration for beautiful dresses. Guest Judge Catherine Malandrino.

The remaining All Stars are confronted with their toughest challenge yet; use lighting technology to create an avant garde design to be judged by music legend Pharrell Williams. The lights are dimmed for a Runway show unlike ever seen before!

To determine which three All Stars make it to the finale, the designers get a lesson in the business of fashion. The winning outfit is produced by designer Nanette Lepore and sold nationwide for charity.

The final three All Stars have just four days to create a signature collection for a VIP red carpet Runway show. After a visit to Joanna Coles at Marie Claire headquarters plus some surprise visitors to the workroom, Angela reveals the final All Stars twist.

The moment of truth arrives for three final All Stars as they present their signature collections to a VIP Runway show crowd. Guest judges include fashion icon Tommy Hilfiger. Who will claim the biggest prize in Runway history and be crowned the first 'Project Runway All Stars' winner?