A bit of a Battlestar Galactica reunion as Tricia Helfer (Number 6) and Lucy Lawless (D'Anna Biers) appear together in this episode.
Julie Benz and Eric Balfour also worked together in the pilot episode of Buffy the Vampire Slayer (1997). Darla (played by Julie Benz) turns Jesse (Eric Balfour) into a vampire.