Doctor: Captain, you're not dealing with human beings here!
Group Captain Gilmore: What am I dealing with? Little green men?
Doctor: No, little green blobs in bonded polycarbite armour!
Doctor: You can always judge a man by the quality of his enemies.
Doctor: (after Ace destroyed a Dalek with an anti-tank rocket) You destroyed it!
Ace: *shrugs* I aimed for the eyepiece.
Dalek: SMALL HUMAN FEMALE SIGHTED
Ace: Who you calling small?! *battle rage*
(And the best bit? After she beats up the Dalek with a baseball bat and runs off, the next Dalek to see her makes sure not to make the same mistake twice.)
Dalek: HUMAN FEMALE SIGHTED
(Not small human female. Oh no. They're not stupid enough to challenge Ace.)
Doctor: ... and he left behind the Hand of Omega.
Ace: His hand? What good was that?
Doctor: No, no, not his hand literally, no, no, it's called that because Time Lords have an infinite capacity for pretension.
Ace: Yeah, I've noticed that...
Ace: [The Daleks] are retreating... *yells out of window* Wimps!
(After his plan goes horribly wrong)
Doctor: I think I may have miscalculated.
Doctor: *lassos Dalek shuttle*
Alison: Why are we doing this?
Doctor: Elementary piracy, my dear Alison! Dalek shuttles have massive ground defences and an undefended service hatch on top!
Doctor: I rigged the communications relay to the shuttle control system. We can monitor the Daleks on the transmat in the cellar.
Ace: You can't do that! You messed up the transmat, remember?
Doctor: I can do anything I like!
Dr Rachel Jensen: Now, Doctor, will you please answer one question? Why are two Dalek factions fighting each other?
Ace: It's simple, isn't it? Renegade Daleks are blobs—
Doctor: *puzzled disapproval* Blobs?
Ace: —, Imperial Daleks are bionic blobs with bits added. Well, you can tell that Daleks are into racial purity, so one lot of Daleks reckon that the other lot of blobs are too different. They're mutants. Not pure in their blobbiness.
Ace: They hate each others' chromosomes. To death.
Davros: *rant* ...THE DALEKS SHALL BECOME LORDS OF TIME! WE SHALL BECOME ALL—
Doctor: —POWERFUL! CRUSH THE LESSER RACES! CONQUER THE GALAXY! UNIMAGINABLE POWER! UNLIMITED RICE PUDDING! ETCETERA! ETCETERA!
Doctor: I programmed the Hand of Omega to fly into Skaro's sun and turn it supernova.
Group Captain Gilmore: Super-what?
Dr Rachel Jensen: He blew it up.
Ace: We did good, didn't we?
Doctor: Time will tell. It always does.