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.

NBC's got a lot of new shows this fall. The panels have been non-stop and swag-free today -- and not without a bit of controversy.

First up was Law & Order creator Dick Wolf and new Law & Order cast members Alicia Witt (CI), Adam Beach (SVU), and Jeremy Sisto (Law & Order).

Sisto's character on L&O comes with emotional baggage that makes the angst he carried around as Rachel Griffith's brother on Six Feet Under seem like a birthday party, which is interesting since Wolf is no fan of serial drama.

The absolutely stunning (seriously, she's beautiful!) Jennifer Esposito has signed on for a leading role in a FOX comedy pilot. She'll replace actress Alicia Witt, who dropped out of the project last week due to "creative differences". The comedy is called More, Patience and it's about a New York (where else?) psychiatrist who can't handle her own life. Ah, the irony.

Esposito is also on the WB's Related, which is currently fighting for a time slot on the new The CW network. Does that mean she'll be doing both shows? Busy lady.

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.