[The Saucepan Man]

Given that the film-makers (for understandable reasons, in my view) chose to extend the role of Arwen, it makes perfect sense for Arwen to be the central figure in this pivotal scene in FotR. Had she not been the one to rescue Frodo, she would have had precious little to do in the film, and that would have run completely counter to the idea of playing up the romance with Aragorn in this and the subsequent films.<P>OK, so not everybody agrees with the extension of Arwen's role in the films. However, even if this hadn't been done, it still would have made little sense to introduce Glorifindel at this point, since he had no role to play in the remainder of the story. (Yes, he could have commanded the Elvish battalion that turns up at Helms Deep, but that would have made less sense than having Haldir fulfil this role.) If Arwen had not had a central role, it would have made most sense to have Legolas replace Glorfindel, as they did in the animated film. So, no Glorfindel either way.