NWHS meaning in General ?

"Not What He Seems" is the eleventh episode of the second season of the American animated television series Gravity Falls, created by Alex Hirsch. The episode was written by Shion Takeuchi, Josh Weinstein, Jeff Rowe, Matt Chapman, and Hirsch, and directed by Stephen Sandoval. In this episode, Dipper and Mabel begin to question who Stan really is after officers arrest him for stealing chemical waste. The episode, which breaks the show's status quo by introducing Stan's long-lost twin brother, ends with a cliffhanger to the second half of the season.

"Not What He Seems" was first broadcast on March 9, 2015 on Disney XD, then May 17, 2015 in Switzerland, and was watched by 1.58 million households in the United States. It was the biggest broadcast ever for Gravity Falls during its run on Disney XD until the following episode, "A Tale of Two Stans", beat that record four months later.