There was already a brief description at MSN Entertainment that I wrote an earlier post about:
Spartacus and his men liberate a villa; Oenomaus throws himself into the brutal pits.
Now there is a more detailed one at Starz's site in the tv schedule area:
Spartacus and his men liberate a Roman villa, but its slaves are wary. Oenomaus throws himself into the brutal Pits, and Glaber supports Lucretia’s prophecies, despite Ilithyia’s protests.
Sounds even more intriguing!