Season 4 poster

Season 4

10 episodes July 6, 2018

Episodes

1 S.O.S. Jul 6, 2018 No ratings 2 The Mermaid Cave Jul 13, 2018 No ratings 3 Siren Song Jul 20, 2018 No ratings 4 Whale Song Jul 27, 2018 No ratings 5 The Octopus Mermaid Aug 3, 2018 No ratings 6 The Mermaid Ghost Aug 17, 2018 No ratings 7 The Final Lock Aug 24, 2018 No ratings 8 Trapped Sep 1, 2018 No ratings 9 The Storm Sep 8, 2018 No ratings 10 Atlantis Sep 22, 2018 No ratings