Re: Living witness, Implausible?
The only part I found really implausible, was the part about the Doctor's back-up. All this fuss in the beginning of the show about how bad it was to loose the Doc, it turns out they have a back-up.
Other then that, fantastic episode!!
It was one of VOY's better episode, aside from as you say the massive plot hole.
On the continent of wild endeavour in the mountains of solace and solitude there stood the citadel of the time lords, the oldest and most mighty race in the universe looking down on the galaxies below sworn never to interfere only to watch.