Cybermen [wiki], the enemies of Doctor Who, are making a comeback (and a makeover, apparently!):
Producer, Phil Collinson says: "The villainous Cybermen are as much a part of Doctor Who heritage as the Daleks and so it's a huge personal thrill to see them back. I hope that the evil silver giants will terrify a whole new generation of viewers as they confront the tenth Time Lord."
The sinister breed of monsters; second only to the Daleks in their infamy made their first appearance in 1966 and haven't darkened our screens since 1988. Next year will mark their 40th anniversary.
http://www.bbc.co.uk/doctorwho/news/cult/news/drwho/2005/11/10/26933.shtml - via Master Li (with pics of the original ones)
they've been and gone I'm afraid. I think the episode was on about a month ago.
Yay! More Cybermen! To Boris, just to reiterate what sathan777 says: they won't be back this Saturday, but should be in the final two parts which begins the week after: Army of Ghosts and Doomsday.
I can't wait!