With the new Abnormal Homeland now openly under threat, Henry and Tesla learn that the SCIU weaponized Tesla's work to use against Abnormals. Bigfoot and Kate investigate Caleb's rise to power while Will and Abby look into Magnus' past.

Will begins to experience strange visions that are connected to the Cult of Kali. Magnus has difficulty with finding the solution to their problems.

Magnus has pursued Adam Worth back to 1898 London to stop him from altering and quite possibly completely destroying the future. As she battles to stop Worth, stay hidden from her past-self, and avoid taking any action that might change the events of history, Magnus must also figure out how to get back to her own present day timeline.

Magnus and Tesla investigate a former Praxian stronghold and unintentionally stumble on vampiric secrets.

Seeking a gateway to the secret subterranean city, Magnus leads a treacherous mission to Tibet - telling a bitter Adam that he must stay behind while promising to bring back a cure for their radiation sickness. Because of their source blood, Magnus insists that Tesla and Druitt stay behind as well, taking the only shield Tesla was able to construct for herself. The hidden city, however, is rigged with deadly security traps - and death awaits the team at every turn.

Receiving word that a large group of Abnormals has been spotted near a South Dakotan cave entrance, Magnus realizes it's the first wave of Abnormals emerging from Hollow Earth.

Magnus is revived to answer Ranna's questions and soon figures out that despite Ranna's efforts the city is in great deal of trouble and the fall of Praxis could also threaten the surface world however Magnus is able to help. Magnus and Ranna makes an understanding to help and she revives rest of the gang. Magnus manages to save the city with the help from Gregory Magnus meanwhile Will tries to breakdown Adam's plan that can cause huge trouble.

Magnus flies to a remote island in Africa to meet with the Sanctuary's new top secret advisor, but lands herself in the middle of a deadly hostage situation.

With a government inspector threatening to cut off the Sanctuary's funding, Magnus and Will must explain a mission gone wrong. Meanwhile, Henry has a surprise visitor with some shocking news.

Will takes command of the Sanctuary while Magnus and Druitt search for a critical artifact in London. Knowing that Magnus's only hope for a cure lies in the secret subterranean city, Will ignores her warnings and releases Adam-Hyde in the hope that he will lead them to an access point for Hollow Earth.

With Adam on lockdown at the Sanctuary, Magnus investigates his connection to Hollow Earth - and Druitt - while being forced to reveal dark secrets about the chaotic origins of the Five.

The team goes on a routine mission to retrieve an Abnormal and take it to safety. But the mission becomes anything but routine when they are forced to stage a bank heist in order to protect the public from harm.

The team investigate a murder in Mumbai, and find a connection to the ancient cult of Kali, whose followers can foretell disaster. However, Will falls ill and disappears, and is somehow linked to the mystery.

The Cabal's new "Super-Abnormals" begin destroying Sanctuaries around the world. It won't be long before they launch their attack on the Old City Sanctuary, and Magnus must choose between saving Ashley and saving the Sanctuary Network.

Magnus responds to an anonymous call for help at an abandoned building. But when she gets trapped inside, she discovers whoever made the call has a very different agenda.

Will suffers from amnesia regarding the events of his near-death experience, but some unwanted visitors become intent on finding out what is locked in his memory.

The team tracks an аbnormal fugitive, and discovers that Tesla is the head of a secret research lab for a Homeland Security agency that conducts tests on Abnormals.

Word of a possible werewolf sighting prompts Henry and Will to visit an English psychiatric facility. As they probe a potential connection to Henry's Hyper Accelerated Protean past - and future - Magnus and Tesla investigate the mysterious holographic city.

A mysterious abnormal attacks Abby, and Magnus and Will discover there's only one way to communicate with this unusual enemy - through music.

Dr. Helen Magnus, her daughter Ashley, and new to the Sanctuary, Dr. Will Zimmerman release three women from a mysterious crypt in Scotland, bringing them back to the Sanctuary for refuge. Unbeknown to the team, and the women themselves, they have extraordinary powers. And their disappearance does not go undetected by a powerful cabal, resolute on reclaiming what it determines is theirs.

Investigating the disappearance of an old college friend, Will finds himself caught in an underground fight club where the combatants are genetically engineered abnormals who fight to the death like modern day gladiators.

While transporting a usually docile abnormal, Magnus's helicopter crashes, leaving her and Will stranded in the shaft of an abandoned oil rig. They soon find they are not alone in the water.

Will and Henry's double date goes awry when Magnus tasks them with an Abnormal delivery.

As Will attempts to help Alexi cope with his abnormality, Helen gets a visitor from her past.

When a mating pair of cute, furry and seemingly harmless abnormals is brought in for scientific study, the Sanctuary team begins to exhibit some hidden animal attractions for one another.

After capturing a particularly elusive abnormal the plane carrying Dr. Magnus and Will crashes while transporting the creature. Dr. Magnus and Will soon discover why this abnormal has never been captured before.

A disoriented Magnus wakes up to find the Sanctuary in ruins and the entire city decimated, with no memory of how the devastation occurred. While surveying the destruction, she is attacked by an inhuman creature but saved by two armed men who stun her and take her to an abandoned warehouse. After being hosed down and left shivering and exhausted, Magnus fears the worst when a battle-scarred figure enters the room.

An investigation into a string of bizarre robberies leads Magnus and Will to a crime ring of thieves who seem to be able to slip between the cracks of the law… literally.

Magnus and the Sanctuary team attempt to capture a rare and deadly creature - all under the watchful eye of a local news crew.

The enigmatic Dr. Helen Magnus recruits insightful forensic psychiatrist Will Zimmerman to join her in the quest to track, study and protect the strange and often terrifying creatures that secretly populate our world.

Dr. Helen Magnus fights to save the life of one of the Sanctuary’s research scientists who was viciously attacked by a seemingly docile Abnormal. Baffled by the creature’s uncharacteristic behavior, Henry tries to figure out what, or who, caused the domesticated Abnormal to react so violently.

A young artist with an uncanny ability to draw remarkably detailed pictures from memory may be the key to solving a case surrounding the suspicious death of his abusive father.

Magnus and Will investigate a distressing call for help deep below the Bermuda Triangle resulting in a deadly battle to save Magnus’s life.

While leading a covert meeting in Rome, Magnus encounters an old friend from her past who confides that the cabal has come to exact revenge on her for the events in "Fata Morgana."

A superhero is trapped by Magnus, and his lack of finesse affects the team's work. Elsewhere, Will and Declan go on the search for a creature that's loose in the city, after the discovery of an eggshell.

Will's transformation has him literally climbing the walls.