LOS ANGELES — In titling its new series "Spartacus: Blood and Sand," the Starz Network cannot be accused of false advertising. There is blood, and lots of it — buckets of it, waves of it, seas of digitally enhanced candy-apple-red comic-book gore, spilling, spurting, hurtling across and toward the screen as bodies are stabbed, slashed, sledgehammered and variously dismembered.