What's one thing you wish McDonald's served but doesn't?

If you're a fan of the animated Adult Swim show Rick & Morty, there's only one answer: Szechuan Sauce. The Mulan, Szechuan teriyaki dipping sauce. That McNugget sauce.

McDonald's is finally making fans' pleas heard and is bringing it back on Saturday, October 7.

Huh? Sauce?

Earlier this year, the condiment made an appearance in the third season premier of Rick & Morty. Specifically, Rick expresses his desire to once again taste the sweet, sweet sauce. The limited edition teriyaki-flavored dipping sauce was released in partnership with Disney to promote the 1998 animated film Mulan. It was included the Chicken McNugget Happy Meals with a Mulan toy.

After Rick's impassioned monologue about his desire to find the sauce, fans began pummeling McDonald's to bring it back. On Twitter, Facebook, and even via a petition on change.org, obsauced fans made their message heard.

Now, their tweets have been answered.

The catch? It's for one day only. And, you have to order a specific menu item at a specific time to get it. It will be available with 4-piece, 6-piece and 10-piece Buttermilk Crispy Chicken Tenders starting at 2 p.m. at participating McDonald's. As a new menu item for McDonald's, this is not only a move to give the Rick & Morty fans what they want, but also entice more people to try the tenders.

Along with the one-day-only re-release of the Szechuan Sauce, McDonald's is also giving away limited-edition, hand numbered, screen-printed posters for all 10 of their sauces. McDonald's partnered with Chicago-based studio Delicious Design League. Their artists and designers created the art for the posters, screenprinted and hand-numbered 1,000 of them. That small batch of posters will be distributed across all participating McDonald's, so it might be more even more difficult to get your hands on one of these than the Szechuan Sauce. Each location will only have a handful to give away.

The limited edition nature of this launch will likely bode pretty well for the brand. On Saturday, fans will descend upon their local McDonald's. Many will likely even line up for hours in advance to make sure they don't miss out. Along the way, they're be Tweeting, Facebooking, Instagramming and Snapchatting their journeys. The sauces will get plenty of social media play, and so will the whole reason McDonald's did this in the first place: the Buttermilk Crispy Chicken Tenders.