20 Things You Didn't Know About Star Trek: First Contact
10. The Norway-Class Ships Never Appeared Again Because The CGI Files Got Lost Or Corrupted
First Contact depicts The Battle of Sector 001, in which Starfleet destroys the Borg Cube at considerable cost to their number.
Among the vessels involved in the battle are a fleet of Norway-class Federation starships, which were designed - among others - by Industrial Light & Magic's long-time art director Alex Jaeger.
A year after the film's production, however, ILM asked Paramount to send them the CGI models for these ships for use in an episode of Star Trek: Deep Space Nine - season six's "Sacrifice of Angels," to be precise - and according to the show's VFX Supervisor David Stipes, the files were rendered inaccessible for "technical reasons."
It's been heavily suggested that the Norway-class model data was either lost or corrupted at some point, explaining why the ships have never appeared in any other live-action Star Trek media, given the massive effort of reconstituting the entire model from scratch.