Re: The Undiscovered Country length
of "Flashback" can be chalked up to Tuvok's fractured memories. Up to and including him even being onboard the Excelsior during the events of that movie. The poor, deluded Vulcan.
It's just a pity we can't do the same with "Threshold", really.
Why can't we? Obviously that was just some holodeck scenario that LaForge and Leah Brahms were running to try to figure out how Warp 10 would theoretically work before turning it off as just being too silly.
(And by that, I mean "Voyager". Consider it a love letter to the fans.
As the brilliant philosopher once said... Everybody, have fun tonight. Everybody, Wang Chung tonight.