And they really shouldn't have called the island Cicely. I kept thinking they were talking about Sicily, which is also an island and is much larger and much less Pacific-Northwest than the one they were talking about.
Weird non-appearance by Prospero here. The actor was credited, but all we got was two shots of him, one from behind and one briefly of his face with animated spell energies obscuring his mouth -- like they couldn't actually get him to appear, so they just dropped in a clip of him and hid the lack of lip sync with his voice recorded later.
The Prospero thing was odd, I agree.
The Cicely name, I believe, was a reference to
Northern Exposure and their setting of Cicely, Alaska; one of many such allusions to other shows and tropes in this episode.