"The birth takes place on a vast space ship. The interstellar human government hopes to breed more aliens, and use them for--oh, developing vaccines, medicines, a gene pool, stuff like that. The aliens have a remarkable body chemistry. Ripley's genes are all-right, too: They allow her reconstituted form to retain all of her old memories, as if cookie dough could remember what a gingerbread man looked like. Ripley is first on a giant government science ship, then on a tramp freighter run by a vagabond crew. The monsters are at first held inside glass cells, but of course they escape (their blood is a powerful solvent that can eat through the decks of the ship). The movie's a little vague about Ripley: Is she all human, or does she have a little alien mixed in? For a while we wonder which side she's on. She laughs at mankind's hopes of exploiting the creatures: "She's a queen," she says of the new monster. "She'll breed. You'll die." When the tramp freighter comes into play, we get a fresh crew, including Call (Winona Ryder), who has been flown all the way from Earth to provide appeal for the younger members of the audience. Ryder is a wonderful actress, one of the most gifted of her generation, but wrong for this movie. She lacks the heft and presence to stand alongside Ripley and the grizzled old space dogs played by Ron Perlman, Dominique Pinon, Dan Hedeya and Brad Dourif. She seems uncertain of her purpose in the movie, her speeches lack conviction, and when her secret is revealed, it raises more questions than it answers. Ryder pales in comparison with Jenette Goldstein, the muscular Marine who was the female sidekick in "Aliens." Weaver, on the other hand, is splendid: Strong, weary, resourceful, grim. I would gladly see a fifth "Alien" movie if they created something for her to do, and dialog beyond the terse sound bites that play well in commercials. Ripley has some good scenes. She plays basketball with a crew man (Perlman) and slams him around. When she bleeds, her blood fizzes interestingly on the floor--as if it's not quite human. She can smell an alien presence. And be smelled: Her baby recognizes her mother and sticks out a tongue to lick her."