She's obviously cut off before she's blown up. But just wondering if anyone had an idea of what she was going to say. What are Rachel Dawes last words in The Dark Knight?
The sentence starts "Somewhere...", but is cut off. We can speculate as to how that sentence is going to end, but ultimately we just don't know.
The following is an screencap of The Dark Knight's script:
Harvey? Harvey, it's okay...
EXT. 52ND STREET, GOTHAM -- NIGHT
Gordon, axe in hand, RUNS towards the entrance-
INT. WAREHOUSE -- NIGHT
Rachel can hear Dent. The counter runs out.
AN EXPLOSION. ALL-CONSUMING.
Just rewatched the scene, her (actually spoken) last words are
Harvey, it's okay. Its alright. Listen. [start of unknown word] [BOOOM!].
From both the context of the scene (as she seems to try to calm Harvey down) and the sound of [start of unknown word] (which sounds like "some" to me), my best guess would be something similar to
Someone will come to save me too.
According to the novelization by Dennis O'Neill which was likely based on an earlier script:
“Bruce… Harvey… I love you.”
Of course, that doesn't match with the movie dialogue, where she starts with "Some—" before she's cut off. Fan speculation has largely been that she was saying something like "Someone is coming to get me" although a few have suggested she's instead trying to tell him there's a mole in the office, "Someone in our office is working with the mob."