Aired: 7/6/2018
Madison and Valerie are in trouble! Beatrice and Will must search for the Magic Mirror to find out what happened!
Aired: 7/13/2018
Madison and Valerie face their sea monster kidnappers as the humans embark on a quest to find their lost mer-friends!
Aired: 7/20/2018
Madison and Valerie must figure out what mermaid song will open the magic lock to the well of power while Jed pays some old friends a visit.
Aired: 7/27/2018
Madison, Valerie and the sea monsters come up with a plan to get a whale song into the well of power while the gang lands in Indonesia to begin their search for the mermaids.
Aired: 8/3/2018
Valerie must learn an ancient technique in order to open the octopus lock while Nat and Liam have to fight their way to getting the magic ring.
Aired: 8/17/2018
Madison and Valerie must battle Ronan and Petromey to unlock the next stage of the well of power while Stanley and Will look for the ghost of a mermaid to help them translate the magic ring.
Aired: 8/24/2018
The final lock has the Mermaids confused as the humans get closer and closer to finding the location of the lost Mermaids!
Aired: 9/1/2018
United, the Mermaids, humans, and sea monsters figure our how to open the final lock on the well of power, but something goes wrong!
Aired: 9/8/2018
The Mermaids, Humans, and Sea Monsters come up with a plan stop Will's dad from stealing the worlds magic!
Aired: 9/22/2018
In the season 4 finale, the mermaids, humans and sea monsters must unite to stop the magic well from destroying everything in its way!