It's kind of spectacular when worlds collide, and when Ronald D. Moore and Joss Whedon met up during the writers' strike, they did more than just dump a few hundred-thousand pencils. Whedon's confessed love for "Battlestar Galactica" has yielded its first offspring. Tahmoh Penikett, best known as Capt. Karl C. "Helo" Agathon to BSG fans, has been cast in Joss Whedon's upcoming series, "Dollhouse." Casting news is starting to leak out about the much-awaited series created by Whedon and Eliza Dushku. Penikett will play Paul Smith, an FBI field agent who's been chasing the urban myth of the Dollhouse and becomes a twisted romantic foil for Echo (Eliza Dushku). Others cast in the show all qualify as candidates for tongue twisters, but if "Dollhouse" doesn't get "FOXed" over the ...