[major spoilers!] ALIEN: THE DIRECTOR'S RECUT

Ridley Scott stated on Saturday (Sept. 6) at the Toronto
International Film Festival (TIFF) that four minutes and fourty-seven
seconds of footage was edited into ALIEN in order to create ALIEN: THE
DIRECTOR'S RECUT (the onscreen title of which simply is "Alien"), but
that approximately five minutes of footage was edited out of it, with
the result that ALIEN: THE DIRECTOR'S RECUT is twenty-six seconds
shorter than it; I don't think that the two precise figures were meant
to be taken literally, however.
With reference to the "Deleted Scenes" on the ALIEN: 20TH
ANNIVERSARY EDITION DVD:

"Alien Transmission" is in the director's recut.

"Lambert Confronts Ripley" is in the director's recut.

"A Quick Glimpse" is in the director's recut, but not as a continuous
whole - some of it appears before Brett's 'lobotomy' by the alien, and
some of it appears after this.

"The Cocoon Sequence" is in the director's recut. I believe that this
scene ends right before the one that begins at 1:36:21 on the ALIEN:
20TH ANNIVERSARY EDITION DVD. In any case, it appears after Ripley has
activated the Emergency Destruction System to scuttle The Nostromo.