"Binary Star!"
The X-Men escape the Brood with the help of Kitty and Carol Danvers' new mutant form, Binary. Storm figures out what's inside of her and leaves the ship as Wolverine finally comes clean to the rest of the team about what they carry inside of them. In a rage, Carol leaves the ship by punching a hole in the hull, nearly sucking the X-Men out into space.
First appearance of Binary.