Next episode: Thu, May 28

Siren

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Legend has it that Bristol Cove was once home to mermaids. Now, this coastal town has a mysterious new visitor in a girl named Ryn, who may just prove that all of the stories are true. Ryn catches the eye of local marine biologist Ben, and when he begins to show interest, fellow marine biologist Maddie becomes suspicious. Others in town, like deep sea fisherman Xander, are on a quest to discover the truth that is out there, and Helen, the town eccentric, knows more about the mysterious creatures than she lets on. The battle between man and sea takes a dangerous route as these predators seek to claim their birthright.

Latest episodes

VOD available
Tia unleashes a deadly attack on Bristol Cove; Ryn, Ben and Maddie race against time to find a cure for Xander's mysterious illness, while anticipating Tia's next move; Baby Hope returns to land to reconnect with Ryn.
VOD available
Ryn, Ben and Maddie must protect Bristol Cove from Tia's army; Ben's injections produce unexpected results, which alarms both him and others; Xander juggles best man duties in Calvin's wedding, while also helping Helen.
VOD available
Ryn, Ben and Maddie must recruit new allies in the fight against Tia; Helen seeks answers when she's haunted by Donna's spirit; Tia obtains dangerous weapons she plans to use in her fight; Xander struggles to make amends with Annie.
VOD available
Ryn discovers a refuge of injured mermaids that escaped Tia's violent takeover; Ben and Xander get caught in a battle with Tia's troops; Maddie feeds Robb half-truths to secure his discretion; Ted explores his family lineage.
VOD available
Ryn returns to land to explore human motherhood; Maddie and Robb come across a gruesome discovery; Ben experiences mysterious side effects, and Ted confronts Helen.
VOD available
Ben and Maddie help Ryn guide her surrogate through a life-threatening delivery; Helen and Xander deliver a hybrid corpse to Beth at The Ranch; Xander faces danger on the high seas during a ride-along with the Bristol Cove water patrol.
VOD available
Ryn seeks help only to learn of the secret existence of her unborn child; Ben sets out on a dangerous path to help his mom, while Xander tries to establish himself in his new career; Helen consults with Eliza to help contact Sarge.
VOD available
When another mysterious death is uncovered in Bristol Cove, Ryn suspects Tia; Maddie befriends a new acquaintance in Seattle; Helen warns the hybrids of trouble; Xander begins training; Ted revisits the past.
VOD available
As an old friend visits Helen, a new mermaid arrives leaving Ryn questioning their motives; Maddie learns the truth behind Ian's death, as Ben fights for his mother's treatments; Xander is inspired to take on more responsibility.
aired 297 days ago
Ben faces a choice that has rippling consequences among mermaid, hybrid and human alike, as the truth about mermaids is exposed.
aired 304 days ago
Ben and Xander deal with a shocking discovery about Chris and his connection to the military; Helen and Maddie reluctantly seek help from the hybrids as the threat of extinction looms over the mermaids.
aired 311 days ago
When mating season turns out to be less successful than everyone had hoped, the possibility of the mermaids procreating on land is questioned; Ryn brings a new mate ashore for the good of the colony.
aired 318 days ago
As mermaid mating season begins, Ryn knows she will need to go back to the sea to help her colony; the hybrids convince one of the mermaids to come with them to a remote location, leading Helen and Ben on a hunt to find them.
aired 332 days ago
Ryn goes back to the ocean to get help for Ben and Maddie's conditions, but discovers that continuing to go back may get harder than she realized the longer she's on land; Helen and Ted connect over their shared family histories.
aired 332 days ago
Maddie and Ben contend with how to help Ryn knowing that in order to help Elaine get better, they will need to continue the procedures on Ryn; one of the group gets sirened, piquing the interest of the military of how Ryn can be of use to them.
aired 339 days ago
Elaine Pownall seeks treatment from the military's medical trial using mermaid cells, but the procedure doesn't come without side effects to the mermaids; Helen and Rick learn more about the hybrid status and their history in Bristol Cove.
aired 346 days ago
Ben, Maddie and the other humans deal with the fallout from the attack on the oil rig, while the mermaids re-acclimate to their ocean home; Ryn returns to land to follow through on an agreement she made with the military.
aired 437 days ago
Mermaids and humans join forces in a radical plan to stop the oil company, but their efforts have a devastating effect; facing an uncertain future, Ben, Maddie and Ryn come together for a romantic farewell.
aired 444 days ago
Tensions rise following a shocking discovery; living in a tank rather than the ocean starts to have an adverse effect on many of the mermaids; hoping to save her kind and help her human circle, Ryn makes a deal with a complicated ally.
aired 451 days ago
Dale copes with the fallout from Maddie and Ryn's encounter with the man from Susan's past; Katrina continues to persuade the rest of the mermaid pack to get on her side, even if it means brute force against both mermaids and humans.
aired 458 days ago
Ryn encounters some resistance as she continues to try to teach the other mermaids how to be more human in order to better assimilate; Maddie finds herself in a dangerous situation while trying to help her mother.

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