Carolyn Seylour, The woman who plays Mrs. Templeton also played Subcommander Taris in the TNG episode "Contagion", Mirasta Yale in the TNG episode "First Contact", and Commander Toreth in the TNG "Face of the Enemy"
Nitpick: Although Paris and Tuvok have worn the incorrect rank pips for most of the season up to this point, in this episode, their ranks seem fluctuate from scene to scene.
Janeway: Apparently you've just crashed the main computer, locked out the bridge and stopped this ship cold. Do you want to tell me why?
B'Elanna: Captain, I don't know what you're talking about.
Janeway: (huffs) What the hell is going on here?
The Doctor: Mr. Neelix, just because a man changes his drink order doesn't mean he is possessed by an alien.
The Doctor: (to B'Elanna, about a spirit wheel she's put up) You might have asked before adorning my Sickbay with animal remains.
B'Elanna: How did you manage to reintegrate his consciousness?
The Doctor: It involved three neural transceivers, two cortical stimulators and fifty gigaquads of computer memory. I would be happy to take you through the process, but it would take at least ten hours to explain it all to you. Needless to say, it was a remarkable procedure. I would consider writing a paper about it if there were a convenient forum in which to publish it.
The Doctor: I could examine every crew member you've mentioned so far, every person on board for that matter, and it wouldn't do any good. From what we can tell, the alien can jump from person to person at will.
Neelix: It sounds to me like you're defending Ensign Parsons.
The Doctor: I'm not defending him, I'm just pointing out that you're acting a little paranoid. In fact, one could say you're acting a little too paranoid.
(talking about Paris)
Tuvok: Your report, Doctor?
The Doctor: I still have a series of tests to perform, but other than his irritating lapses into nostalgia, I see nothing wrong with him.
Janeway: If you feel at any time, that any of us are under the influence of the alien, you can countermand our orders and take control of the ship. Doctor, do you feel up to it?
The Doctor: Of course. I make life and death decisions every day.
Paris: I feel better already.