Date Posted:17:45:56 08/02/07 Thu
I'm pretty sure that it was in the episode "Pieces of Eight" where Silver mentions that Purity had named the ship. I think he makes another reference to it in "The Eviction", but I'd have to go back and check.
I don't know for sure if in the series it's supposed to be the same ship from the film because they never really say. I was just wondering it anyone else knew.