Evil Season 4 Can't End Without Solving This 5-Year-Old Prophecy Mystery

Summary The mystery surrounding the missing pieces of the Codex from Evil season 1 remains unresolved and could be crucial to the show's finale.

Grace's prophetic abilities tie in with the Codex's missing legend, suggesting her return could be key to deciphering the demonic plot.

Without completing the Codex, the Church may lack a crucial weapon against the evil plan of Leland and The 60 in the upcoming Evil series finale.

Warning: this article contains spoilers for Evil season 4.

With Paramount+ canceling its popular supernatural series, Evil, all the stories that have been built over the show's five-year run will be coming to a head, including a major mystery that was first uncovered in Evil season 1. The series stars Katja Herbers, Mike Colter, and Aasif Mandvi as a team who assess the validity of demonic possessions and other unexplained phenomena for the Catholic Church. Evil also boasts a 100% Rotten Tomatoes score for seasons 3 and 4, further highlighting its success. And yet, unless one particular unresolved issue is addressed, much of that goodwill may be undone.

As Evil season 4 heads toward its finale, it's clear that many people connected to the show are unhappy about its ending. Beyond the fanbase, star Katja Herbers likened the show's cancelation to "a death", adding that concluding the show with "more story to tell...feels really painful" (via Collider). Such comments underscore that the Evil series finale may not be a satisfying end for everyone. Nevertheless, whatever path the show takes, one ongoing mystery must be at the heart of the action.

A Crucial Missing Piece Of The Codex From Evil Season 1 Is Still Missing

Without The Legend, The Codex's Full Meaning Remains Unknown

In Evil season 1, episode 7 "Vatican III," the gang first come across the mysterious codex that the Church had purportedly kept hidden for centuries. The codex depicts 60 different symbols, known as sigils, that represent different demonic houses, but due to age, the codex has many missing pieces. Among the missing pieces is the legend, which would give the codex context, help interpret its meaning, and identify what it shows. Without the legend, the codex is just a map with some symbols on it. Its conspicuous omission could be important in the Evil series finale.

A codex is a predecessor to books that used materials like papyrus or parchment instead of paper. The term is often used to describe ancient manuscripts with handwritten works. The codex was a prevalent format in the early centuries AD and was frequently used for important religious texts.

Ben (Mandvi) is rightfully skeptical that it has remained a secret this long as the trio keep running into the various sigils on the codex. However, it's clear that the codex is of central importance to the evil plan that Leland Townsend (Michael Emerson) has been working towards. He asks his then-fiance Sheryl (Christine Lahti) to steal a copy of it from Kristen (Herbers) and keeps it well hidden. Since then, there have been numerous sightings of the sigils during the team's assessments, but it's still unclear how these 60 demonic houses connect to Leland and the Manager Demon's master plan. This must be addressed before the show ends.

The Codex Sigils Could Bring Grace Back In The Evil Season 4's Ending

Her Prophecies Were Important In Decoding The Codex

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In Evil season 1, the trio assess Grace Ling (Li Jun Li) and her seeming ability to speak directly to God and predict the future. Grace's prophesies are sometimes vague, but the Church decides that her ability is legitimate when she starts drawing things that perfectly fit the gaps left in the codex. In season 2, the Church rescues her from a Chinese reeducation camp and has her hidden away so she can complete the work of filling in the missing pieces of the secret document.

However, the codex's legend remains incomplete. When Sheryl shows Leland a drawing that Grace had done showing the real location of Kristen's husband, Andy (Patrick Brammall), Leland rushes to Grace to kill her. However, Monsignor Korecki (Boris McGiver) manages to thwart Leland, and pays for it with his life. Although this attempted murder was borne from Leland trying to protect his own interests, it also suggests Grace is important enough for Team Evil to want her dead. They don't want her to complete the codex.

With Grace's return, the Church would have an extra weapon to fight against the demonic plot ahead of the Evil series finale.

Given how central the codex has been throughout Evil's four-season run, it seems that Grace will need to complete this critical piece before Leland and The 60 can enact their evil plot. This opens up the potential for the prophet to return and solve the mystery of the codex and the sigils that has plagued the events of the show. With Grace's return, the Church would have an extra weapon to fight against the demonic plot ahead of the Evil series finale.