I have to give credit to Dr. Christmas Jones for being able to disarm a nuclear bomb while travelling at high speed in a pipeline inspection rig. Even though the bomb was never nuclear, she didn't know that when she volunteered.
Valentin. Freeing Bond from a torture device. With one bullet. While mortally wounded.
Even better: "I'm looking for a submarine. It's big and black and the driver is a good friend of mine."
Q: I've always tried to teach you two things: first, never let them see you bleed.
Bond: And the second?
Q: Always have an escape plan. (is lowered into the floor)
—Desmond Llewelyn as Q's final lines before Desmond died in a tragic car accident. R.I.P.
M slapping Elektra across the face upon the reveal of her true colors. Always loved that moment.