When Amanda Jones arrives in London she brings the full force of CIA dissatisfaction to bear on White, who struggles to retain control.

In Washington, we meet the CIA’s Amanda Jones. Max, now in Beirut, doesn’t know who to trust after speaking to Leyla, a member of The Section team there.

Ex-spy Max Easton is brought out of retirement against his will by George White, London chief of MI6/CIA team ‘The Section’.

Dale copes with the fallout from Maddie and Ryn’s encounter with the man from Susan’s past, while Katrina continues to persuade the rest of the mermaid pack to get on her side—even if that means brute force against both mermaids and humans.

Ryn continues to try to teach the other mermaids to be more human in order to better assimilate, but some are starting to resist her, causing Ryn to wonder if she herself is becoming too human. Maddie finds herself in a dangerous situation trying to help her mom. Meanwhile, Ben and Xander reconcile in order to work together to get the mermaid pack back into the water.

Ryn decides they need to find another solution for housing the mermaids, as hiding them becomes increasingly difficult. Ben becomes a mentor to Levi as he tries to learn how men behave on land, while Maddie continues to struggle with her mother’s renewed presence in her life.

Ryn fights to maintain leadership of the pack when the other mermaids question her loyalties. Ben interferes in a mermaid ritual causing friction between himself and Ryn, meanwhile, Helen discovers more about her family lineage.

Ben, Maddie and Ryn desperately try and keep the newly arrived mermaid pack hidden from the rest of the town, but the new mermaids’ quick degradation on land forces them to get them back to the sea unnoticed during the town’s Mermaid Beauty Contest. Elaine grows more suspicious of Helen and her connections to their family.

With more mermaids landing at Bristol Cove’s shores, the threat of discovery increases. After his encounter with the siren song, Ben tries to cope with the after effects. Maddie’s mom returns to town and tries to connect with her daughter. Meanwhile, Ryn attempts to adapt to life on land.

In the season finale, the enchanting siren song takes hold of Ben and Decker. Meanwhile, Dale must answer for the escalating crime in Bristol Cove.

Donna comes ashore with two other members of her colony to bring Ryn back home. When mermaids once again begin wreaking havoc throughout the town, Dale tries to put an end to it once and for all.

Bristol Cove mourns a loss causing Ryn to experience a new human emotion.

When Ryn is taken in for questioning, Maddie rushes to her rescue. Meanwhile, Ben and Xander return to the deep sea to search for answers, only to be met by an uninvited guest.

When Ben and Maddie attend his mother’s fundraising gala, an unexpected guest shows up and offers to put an end to the overfishing that’s threatening the lives of the mermaids in Bristol Cove.

Ben begins to investigate some suspicious overfishing, meanwhile Decker ramps up his efforts to find his escaped mermaid and shows the true extent of his influence.

When the military facility goes on high alert, Chris manages to escape, but he’s not the only one who gets out.

Dale and the local police’s investigation starts pointing directly to Ryn, meanwhile Xander and Calvin’s search for Chris heats up when they locate the nurse who works at the military bunker.

Ben and crew of The North Star uncover a device emitting a strange sound. Meanwhile, Ryn finds shelter in the home of the local folklore expert.

The coastal town of Bristol Cove, once known for being home to mermaids, is turned upside down with the arrival of a mysterious girl.

John meets the demon Beroul and is given an agonizing choice.

John unwittingly unleashes an unspeakable evil that will haunt the rest of his days.

Constantine struggles with sins of the past while traveling to Los Angeles.

John summons the Nightmare Nurse to help in his battle to save Trish.

Matt Ryan returns as DC’s legendary demon hunter, John Constantine, to take on a monstrous foe from his past.

The expedition’s epic journey reaches its climax as men find themselves in a final confrontation with the Inuit mythology they’ve trespassed into.

Hope comes in strange forms, and the question of what the men are willing to do to survive begins to be settled in both noble and horrifying ways.

Deaths under mysterious circumstances create paranoia among the men, and some of the crew may be considering mutiny.

As the men make new attempts to find rescue, a series of shocking events underscores how vulnerable and exposed their situation has become.

With the end of their provisions in sight, officers contemplate a tough, risky strategy while struggling to raise the men’s worsening spirits.

A strange illness begins to show itself while another more familiar one jeopardizes the expedition’s most valuable resource: its captain’s judgment.

A cunning attack on the ships proves the men are not battling an ordinary bear and that the region’s Inuit culture may hold a key to their survival.

With something now stalking the ships, the captains debate their options, testing their loyalty to one another against their duty to their crews.

After a long winter trapped in the ice, scouting parties are sent out in search of open water. One of the teams makes a frightening discovery.

An accident at sea cripples a Royal Navy expedition 200 miles from finding the Northwest Passage, forcing its captains to make dire choices.