The Tenth Doctor:
(Ooh!) Actually, if you don't mind, it's just "the Doctor".
Doesn't even really matter who.
Who am I even talking to? Oh yes, you!
The wannabe Einstein, minus the 'stache.
Travels through time, but with no class.
I'm saving the world while you dilly-dally.
You can't even invent a way out of Hill Valley!
And calm down, will you? Everything is going to be fine.
You're not going to tear any wonky holes in any fabric of space and time.
Actually, it's a lot more like a rug, really. (Oh well.) Never mind.
Let's just say there's an infinite number of me simultaneously kicking your ass with rhyme!
Doc Brown:
Great Scott! You're great…not! I spit it hot,
And generate way more power than 1.21 gigawatts!
I'm not sure what sort of scientific authority you purport to be,
But I'm a real doctor! Where'd you get your degree?
Despite all your companions, you couldn't be having less sex!
I don't know what's lamer: your fans or your special effects!
You don't get another turn to debate! Time to face your permanent fate!
Now Dalek my balls! EXTERMINATE!
The Tenth Doctor:
I'm going to die… (Doctor…)
At least, this version of me… (Doctor?)
Perhaps you'd like another… (Doctor…)
Prepare…to meet…your…
The Fourth Doctor:
Density! Hahahaha!
I'm a mystical medical doc at the pinnacle, shifting my physical form!
You're a possibly pedophilic individual who should have never been born!
You got your knickers in a twist while you're sucking on my Piccadilly, but I'm a lot lot different,
'Cause you're a pitiful hillbilly hanging with an oedipal kid who's a bawk bawk chicken!
Doc Brown:
Nobody calls me chicken!
This is between us, Scarfy! Don't try to out-rhyme me!
You'll find I'm as grimy as any slimy time-limey!
I'll use your port-o-potty time machine as my latrine!
You're not a cat with nine lives. You're a pussy with thirteen!
The Tenth Doctor:
(Ooh!) Actually, if you don't mind, it's just "the Doctor"…