Hints

Copied Image of Coffee Filter

A hidden message written in all cursive capital letters. Using the Hunt a Killer blacklight on the back of the paper reveals a hint to decode the message.
Using the Hunt a Killer blacklight on the back of the paper reveals the words "bifid" and "typical Polybius". The hidden message on the coffee filter can be decrypted by using a bifid cipher, which combines a typical Polybius square with transposition. A typical Polybius is a Polybius square without an extra key.

This note is written to Robert, from M. Notice the description of their current location. It is important to recognize the connection between this note and the coffee filter message.

After the events of the previous season, JWJ has contacted you once again to relay his new plans. He now calls you his "Historian". There are several 1's and 0's hidden in this letter, which reveal a sequence that can be translated using the well-known code.

This memo is from Jacob Nilson to JWJ. It is important to note their past relationship and Nilson's reverence for JWJ.

This map could be used to mark any significant locations mentioned throughout this season.

A print of the painting "Merry-Go-Round" (1916) by Mark Gertler. The artist's reason for painting this piece aligns with JWJ's outlook toward society. The painting's title hints at a museum near JWJ's current location.

This is the nut of an official state tree, which hints at JWJ's current location.

The jumbled message at the bottom of this note can be decoded using a shift cipher. The ".oay" at the end of the message denotes a common URL ending.
The ".oay" at the end of the message denotes a URL ending. By assuming the most common URL ending is ".com" then the letters are mapped as: O=C, A=O, and Y=M. The rest of the alphabet can be mapped using this key.

The decrypted message reads: "DEAR BOB, TO FREE YOURSELF, FREE YOUR TORMENTOR FROM HER CORPOREAL PRISON. DO THIS AND JOIN ME. FAILURE IS DEATH."

When the correct 1's and 0's have been identified, they can be grouped into sets of eight and translated using the binary system. The translated message is "SrSO" and the character for decimal 4. SrSO4 is the chemical formula for strontium sulfate, which naturally occurs in the mineral Celestine. The largest geode in the world is made of Celestine and is located in Put-in-Bay, Ohio.

The decrypted message is "whispersfromtheodorus.com."
On the Whispers from Theodorus website, there is a search bar on the front page. Searching "Incipere", the Latin word found in this note, reveals a password-protected page. Incipere's English translation "begin" is the password. This reveals a post written by JWJ, which provides additional hints about this episode.