SyFy has posted a preview clip for episode 1x09, "End of Line," with Polly Walker and James Marsters.
Here is the synopsis:
"Barnabas escalates his war with Clarice and Zoe tries a daring escape."
And a more detailed one:
"Daniel sets a deadline to reset the Cylon, forcing Zoe to find a way to save herself; Barnabas clashes with Clarice, with Lacy caught in the middle; Daniel makes a confession to Amanda."