Is that the one where they find the female, American, pilot, and a whole bunch of other people from the past ?
Yep - you know your Voyager
Good call with the big battle too - that was unbelievable because we generally only saw big battles on their blippy monitors.
I was gonna post a youtube vid of the first fight scene between Illyria and Angel where she grabs the swords, or the bit where Fred becomes Illyria even, but couldn't find them without some rubbishy rock tune added by fans, so you should all just watch the DVD instead. They were great though.