Lots of casting news today, on the first Monday after the network upfront presentations. First up, Sci Fi managed to close the deal on Polly Walker for their two-hour backdoor pilot Caprica , a prequel to their own series Battlestar Galactica . Astute readers of this site will know that I first reported that an offer was out to Walker ( Rome ) a few weeks ago . Walker will play Sister Clarice Willow, the secretive high priestess/headmistress of the exclusive Athena Academy, a private polytheistic school that Zoe Greystone (Alessandra Toreson) and her friends attend. I think the casting of Walker is absolutely brilliant for this role and she'll definitely bring something unexpected to the table. Plus, I'm happy she's sticking around in the States after the cancelation of Cane . Walker joins Eric Stolz , Esai Morales , and Paula Malcomson in this spellbinding two-hour backdoor pilot project from executive producers Ronald D. Moore, David Eick, and Remi Aubuchon and director