This can't be good ...
Kathryn Janeway is the main captain on the Star Trek spin-off series "Star Trek Voyager " who was reenacted by Mike Nelson in order to steer the Satellite of Love out of harm's way in Experiment #706 Laserblast after Dr. Forrester unplugged the link between the ship and Earth.
He managed to save the day while in character as the Trek character but quickly became unpopular with the Bots once he randomly started to burst into song.
For connections between the Trek universe and MST3K, see the Star Trek wiki Memory Alpha.