Episodes: Series - Siren S3 - 2020

Helen receives a visit from an old friend, and Ben fights to cure his mother.

Ryn becomes suspicious of Tia after another strange death is discovered in Bristol Cove.

Ryn discovers a dark secret about her unborn child, and Xander tries to prove himself in his new job.

Ryn, with the help of Ben and Maddie, assists her surrogate during a life-threatening childbirth.

Ryn comes back to land to experience motherhood, while Maddie and Robb stumble upon a shocking discovery.

Ryn comes across a refuge of wounded mermaids, while Ted discovers his family descent.

Ryn, Ben, and Maddie have to seek new allies in the battle against Tia.

Ryn, Ben, and Maddie have to do everything they can in order to keep Bristol Cove safe from Tia's army.

Tia launches a deadly assault on Bristol Cove, while Ryn, Ben, and Maddie are desperately trying to find treatment for Xander's unknown illness.

As they attempt to rescue Hope, Ryn and Ben challenge Tia in a fight between the mermaid tribes underwater.