Season 01
Season 02
Maddie and Ben contend with how to help Ryn during the procedures to help Elaine; When someone gets sirened, there is more drive than ever to uncover how the siren song really works.
All Episodes - S02
EPS01
More mermaids land on the shores; Ben tries to cope with the siren song's after effects; Maddie's mom returns to town; Ryn attempts to adapt to life on land.
EPS02
Ben, Maddie and Ryn desperately try and keep the newly arrived mermaid pack hidden during the town's Mermaid Beauty Contest; Elaine grows more suspicious of Helen.
EPS03
Ryn fights to maintain leadership of the pack; Ben's interference in a mermaid ritual causes friction; Helen discovers more about her family lineage.
EPS04
Ryn looks for new housing for the mermaids; Ben becomes Levi's mentor; Maddie continues to struggle with her mother's presence.
EPS05
When Ryn teaches the pack to be more human, they start to resist her; Maddie finds herself in a dangerous situation; Ben and Xander reconcile to get the mermaids back into the water.
EPS06
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.
EPS07
Tensions rises following a shocking discovery; The water tank starts to have an adverse effect on the mermaids; Ryn makes a deal with a complicated ally.
EPS08
Mermaids and humans join forces in a radical plan to stop the oil company, but their efforts have a devastating effect.
EPS09
Ben, Maddie and the other humans deal with the fallout from the oil rig attack; Ryn comes back to land to follow through on an agreement she made with the military, unaware of their ultimate goals.
EPS10
Elaine's treatment from the military's medical trial comes with side effects to the mermaid cells; Helen and Rick learn more about the hybrid status.
EPS11
Maddie and Ben contend with how to help Ryn during the procedures to help Elaine; When someone gets sirened, there is more drive than ever to uncover how the siren song really works.
EPS12
When they learn of a special place in Ryn's homeland that could help with their conditions, Ben, Maddie and Ryn all venture under the sea together to find the cure.
EPS13
Ryn must return to her colony for mermaid mating season; Ben and Helen hunt down the hybrids when they lure a mermaid to a remote location.
EPS14
An unsuccessful mating season leads to questioning the possibility of the mermaids procreating on land; Ryn brings a new mate for the good of the colony.
EPS15
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.
EPS16
Ben faces a choice that has rippling consequences amongst mermaids, hybrids and humans alike, as the truth about mermaids is exposed.