May sweeps has officially arrived. For TV fans that means a full month of explosive season finales, jaw-dropping cliffhangers and -- best of all -- a long list of famous guest stars from both the big and small screens.

Among the A-listers you'll see this season: a daytime TV queen (Elisabeth Hasselbeck), a 'Star Trek' icon (Leonard Nimoy) and a two-time Oscar winner (Jodie Foster) who will finally let Maggie Simpson do the talking.

Check out our guest stars gallery to see when all of Hollywood's finest will be sweeping their way onto your favorite TV shows.

The Sci Fi network just announced its purchase of the U.S. rights to a German production, titled Dark Kingdom: The Dragon King, based in part on the Ring of the Nibelungs myth. Never heard of the myth? Apparently it's been known to have inspired composer Richard Wagner's operas and J.R.R. Tolkien's The Lord of the Rings trilogy, so what's one more?

The movie stars Benno Furmann, Kristanna Loken, Alicia Witt, Julian Sands and Max Von Sydow. The German version first aired on German TV in 2004, where it was the year's top-rated TV movie.

Honestly though, if Sci Fi's track record is any indication, I have high hopes for this mini-series. Though, the question is, is this mini-series meant to stand on its own, or is it a test precursor to a full-blown series? The movie was top-rated on German TV in 2004, if that's any indication to its success here in the U.S.