General Hospital may have just planted its biggest mystery yet, and fans are wasting no time putting the pieces together. While everyone is focused on Cullum’s betrayal and Josslyn’s shocking deal with the WSB, another question refuses to go away. What if Z has been pulling the strings from the very beginning? The latest episode left viewers with more questions than answers, and many now believe Cullum was never the true mastermind. Instead, they suspect Z has been hiding behind every major twist, carefully manipulating events while keeping his own hands clean.

One of the biggest clues fans keep pointing to is Z’s unbelievable calmness. Considering the WSB had just suffered one of its greatest internal disasters, his reaction felt strangely emotionless. A trusted agent was exposed as a double agent, multiple lives were destroyed, classified operations collapsed, and yet Z barely seemed surprised. Instead of acting like a leader dealing with an unprecedented crisis, he appeared almost prepared for everything that unfolded. For many viewers, that wasn’t confidence. It looked like someone who already knew exactly what was coming.
Even more suspicious was Z’s complete lack of concern about Brennan. Throughout the entire conversation with Josslyn, Brennan was barely acknowledged, despite being one of the most important people connected to the operation. Brennan possesses critical information about Cullum, the WSB, and several hidden conspiracies. If Z were truly trying to uncover the truth, Brennan should have been one of his first priorities. Instead, he almost acted as if Brennan didn’t matter at all. Fans immediately questioned whether this silence was intentional. Some believe Z avoided discussing Brennan because he already knew Brennan’s condition and possibly even expected him to disappear from the investigation.

Another detail fueling speculation is the deal Z offered Josslyn. Rather than demanding the complete truth, he seemed far more interested in protecting the reputation of the WSB. His proposal conveniently shifted most of the blame onto Cassius while allowing Cullum to appear far less damaging to the organization than he actually was. If exposing the real truth would only embarrass the WSB, why was Z so desperate to rewrite the narrative? To many fans, it looked less like damage control and more like someone protecting his own involvement.
This has led to an even darker theory. What if Cullum was never acting alone? Fans believe Cullum may have simply been Z’s most valuable operative. Cullum carried out dangerous missions, manipulated countless people, and climbed through the WSB ranks for years without anyone stopping him. Such an enormous operation would have required protection from someone with real authority. If Z occupied a position capable of controlling investigations, suppressing evidence, and steering internal decisions, Cullum’s long-term success suddenly becomes much easier to explain.
Some viewers have even questioned whether Z intentionally sacrificed Cullum once the operation began collapsing. Once Josslyn uncovered too much and Jason and Valentin closed in, Cullum became a liability rather than an asset. Allowing him to take the fall would protect whoever truly orchestrated the conspiracy. This strategy fits perfectly with classic spy storytelling, where expendable agents are discarded to preserve the people at the very top. If that is exactly what happened, Cullum’s downfall may have been planned long before anyone realized it.

Z’s behavior toward Josslyn has also raised eyebrows. Rather than treating her as a traumatized witness who had survived a deadly mission, he immediately evaluated her usefulness to the organization. He complimented her abilities, praised her potential, and appeared eager to keep her inside the WSB. Some fans believe this wasn’t admiration at all. Instead, they think Z recognized someone intelligent enough to become either an invaluable ally or a dangerous enemy. Recruiting Joss would keep her close while allowing him to monitor exactly how much she truly knows.
The Brennan mystery only strengthens these suspicions. Brennan possesses information capable of exposing the hidden layers of the conspiracy, yet the storyline has strangely pushed him into the background. If Brennan eventually returns with evidence connecting Cullum to someone even higher inside the WSB, Z could instantly become the prime suspect. His silence regarding Brennan may not be a writing oversight. It could be the show’s way of quietly signaling that Brennan remains the greatest threat to Z’s carefully constructed facade.
Perhaps the biggest reason fans continue embracing this theory is because it perfectly fits General Hospital’s history. The show has repeatedly introduced apparent villains only to reveal someone far more powerful manipulating events behind the scenes. Every time viewers think the mystery has been solved, another layer emerges. Right now, Cullum looks like the obvious culprit. That alone makes many longtime fans suspicious. Soap operas thrive on hidden masterminds, secret betrayals, and shocking reversals, making Z an ideal candidate for the next major villain.
Of course, none of these theories have been confirmed on screen. They remain fan speculation based on suspicious dialogue, unusual character behavior, and unanswered questions. Still, if even part of this theory proves true, General Hospital may be setting up one of its most explosive reveals in years. Cullum’s downfall could merely be the end of the first chapter, while Z’s carefully hidden game is only beginning. If fans are right, Port Charles hasn’t defeated its greatest enemy yet. It may have just shaken hands with him.