You're wrong about River. River's not on the ship. They didn't want her here, but she couldn't make herself leave. So she melted... Melted away. They didn't know she could do that, but she did.
River ,'Objects In Space'
The Quotable Buffy: She said that? When?
[NAFDA] Sometimes you just can't let those lines hang there in the air. Joss and his writers are too clever for their own good. Here's the place to let the rest of the world see why.