What Is That Noise?!

Every time I hear the song Serenade by Schubert I think of an episode of something or other featuring, I think, Donald Duck. It shows him being extremely depressed and the ocean luring him in to kill himself. But at the end he rallies and escapes the ocean. Over the whole thing a narrator comments on the heroes struggle.

Has anyone out there seen or heard of this episode? It's driving me crazy. I can find no reference to it anywhere on the internet.