
dsptanmay
1204
17
2

The middle of the episode contains this image.

We will use themysteryofgravityfalls.com to decode the content.

The first step is decoding the numbers using the "A1Z26" cipher.
The second step is passing the words from the end of the first step through the "Atbash Cipher" (flipping them).
The third step is passing the words from the end of the second step through the "Caesar Cipher" (-3).

After we do all that, we get this.