Dr Danger

S1, E25: Dr Denman returns to do research on Mako Island and the girls fear this means trouble. Meanwhile, Emma is having family dramas of her own – trying to avoid going on the family beachside holiday. Zane hears about Denman's research and is intrigued – perhaps she can help him find the mermaid. He suggests she place cameras near Mako Island. She does and in doing so, finds the moon pool and a mermaid scale!