NX-2000
From Tardis Wiki, the free Doctor Who reference
The NX-2000 was an experimental spacecraft which underwent first flight tests during 2050. The tests were mentioned in a news broadcast by The Department. (K9TV: The Bounty Hunter)
Behind the Scenes
The NX-2000 is a reference to the USS Excelsior of the Star Trek franchise which had a starship registry of NX-2000.