TVShowsonDVD has more info on the release of Battlestar Galactica Season 4 Blu Ray edition.

Lucy appeared in the following episodes:

* The Hub - Episode 9
* Revelations - Episode 10
* Sometimes a Great Notion - Episode 11: (Final Lucy episode as D'anna Biers)

You can found out more about Lucy as D'anna Biers on Battlestar Galactica by visiting the AUSXIP Lucy Lawless Battlestar Galactica subsite

Find out more about the Blu-Ray release and the extras here