Bethesda has released a trailer for the upcoming latest piece of downloadable content for Fallout 3, to be released on Monday, showing us the innards of this “very large and treacherous gauntlet,” as lead artist Istvan Pely describes it. “My recommendation is to take your time and explore every dark corner and every innocuous-looking telepad of this vessel, there’s some things you wouldn’t want to miss.”

Pely also confirmed that Mothership Zeta will indeed be the last piece of downloadable content we’ll be seeing for Fallout 3. This is “the Vault Dweller’s final and most fantastical adventure in the Capital Wasteland, or rather several hundred miles far above it. The concept of the UFO visit emerged early in the idea-toss sessions we had for DLC, in fact it was the very first thing to pop into my mind; it just seemed a natural fit. But we saved it for last, as a fitting conclusion to the Vault Dweller’s story.”

But hey, there’s always Fallout: New Vegas.