S1·E12 Fractured Fairy Tales - The Fisherman's Wishes

A little fisherman goes out to fish and nets a mermaid. After the man gives in to her pleas to be let go, the mermaid is willing to grant him wishes for his kindness. After she mends his net, he tells his wife about it all. The fisherman's wife asks him to ask the mermaid for a new apron. This then snowballs into grander wishes till his wife attains Queen-like status. Overcome with power, she demands that her husband wish her to be a goddess. Upon meeting the mermaid again, she asks if he himself has any wish of his own. His one wish is that his wife be happy. His last wish spent, he returns to his ordinary little home and lives happily ever after.