The Doctor, The Valeyard and others in “The Ultimate Foe”

[to Glitz] How often must I tell you? We're not dealing with reality!

[appears nearby] Why waste your breath on that simple-minded oaf? [vanishes and appears again next to Glitz] You cannot speak as though reality is a one-dimensional concept. [vanishes and appears again, face-to-face with the Doctor] Fortunately, there is a reality that you and I can agree on. The ultimate reality.

Death?

"The undiscovered country, from whose bourn no traveller returns." [blinks to the Doctor's other side]

"Puzzles the will." Hamlet, Act III, Scene I.

I really must curb these urges. I've no wish to become contaminated by your whims and idiosyncrasies.

Quite so. What I don't comprehend is why you want me dead. No. No, let me rephrase that. It would satisfy my curiosity to know why you should go to such extraordinary lengths to kill me.

Come now, Doctor. How else can I obtain my freedom? Operate as a complete entity, unfettered by your side of my existence? Only by ridding myself of you and your misplaced morality, your constant crusading, your --

Idiotic honesty?

[appears behind Glitz] Oafǃ Microbeǃ

Well, pardon me for trying to help. I'm neutral in this setup, you knowǃ

[walks over to the Doctor] Only by releasing myself from the misguided maxims that you nurture can I be free. [vanishes]

Sounds to me like Armageddon's beckoning you, Doc.

[reappears, fading as he speaks] With you destroyed and no longer able to constrain me, and with unlimited access to the Matrix, there will be nothing beyond my reachǃ