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