With the Federation-Klingon War officially in the books, Star Trek: Discovery's resilient crew now embarks on a journey across the galaxy to solve a mystery that has even the most brilliant minds in the universe baffled.

Seven synchronized red signals spread across 30,000 lightyears mysteriously appeared in space and the Federation's efforts to figure out what they are have been met with disastrous results. The USS Enterprise, Starfleet's most advanced ship, suffered a catastrophic meltdown after tracing one of the signals, forcing Captain Pike (Anson Mount) to take the helm of the USS Discovery in search of clues about this imminent threat to the galaxy. The signals' arrival also coincides with Spock's (Ethan Peck) apocalyptic visions of a Red Angel, setting the stage for an overarching mystery spanning the entire second season.

There are plenty of questions that need to be answered about this ambiguous figure and those cryptic signals but here's what we know so far:

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Spock predicted the signals before they appeared
In order to cope with recurring nightmares as a child, Spock learned to draw and that skill has served him well. Those horrific dreams returned in adulthood and Spock sketched what turned out to be the seven red signals two months prior to their appearance in space, giving Burnham her first clue to unlocking the head-scratching mystery.

The Red Angel mystery has broken Spock's brain
Season 2 finds Spock unable to decipher what those Red Angel visions mean and that has essentially broken his brain. Taking several months off from serving as Pike's first officer aboard the USS Enterprise, he secretly checked himself into a psychiatric facility on Starbase 5.

"He's had an experience with the Red Angel that kind of pushed him beyond logic," Ethan Peck previously told TV Guide. "He has to uncover his emotional side to have a deeper understanding of what's going on."

It's somehow connected to the red signals
The USS Discovery locked in on one of the signals which took them all the way to the Earth-like planet New Eden, where a group of soldiers were rescued by that mysterious Red Angel 200 years prior. They were hiding out in a church during the chaos of World War III when the figure came to their rescue and sent them far across the galaxy to the Beta quadrant. Although the angel remains an enigma, it's clearly drawn to individuals in dire situations and appears to be using the signals in its efforts to help.

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The signals lead to people in need
The signals are virtually unreadable but when a Starfleet ship does trace one of their locations, that often leads to someone in need of assistance. Discovery tracked one of the signals to an asteroid carrying the USS Hiawatha, a medical rig that crash-landed during the Klingon war, and they were able to save dozens of critically injured officers. The crew also found the New Eden settlers through a new signal and realized the planet was just over an hour away from a nuclear winter before figuring out a way to save everyone.

The Red Angel usually appears during times of great distress
Michael Burnham (Sonequa Martin-Green) first saw the cloaked figure on a destabilizing asteroid while dangerously close to death, and again on New Eden just after a grenade went off right in front of her. The angel also came to the New Eden settlers while they were hiding out in a church during World War III on Earth.

It's not a hallucination
Pike obtained a soldier's old helmet camera which captured the Red Angel on video, confirming that Burnham, Spock and the New Eden settlers weren't seeing a figment of their imaginations. The figure is indeed real — though we don't know what exactly it is just yet.

The Red Angel is a humanoid
We still don't know if this being is human or alien, but Saru's enhanced eyes have painted the clearest picture of the Red Angel so far. Getting a glimpse of the cloaked figure just after it saved his people from genocide, the Kelpien noted that it appears to be a humanoid wearing a mechanized suit with advanced technology far beyond our comprehension. Could this be a time traveler?

Catch Season 2 of Star Trek: Discovery Thursdays at 8:30/7:30c exclusively on CBS All Access.

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