Alias spy Sydney Bristow (Jennifer Garner) is about to encounter a truly frightening foe: the boss from The Office. Ricky Gervais, who plays insecure egomaniac David Brent on the BBC America comedy, will guest-star on an upcoming episode as a "juicy, horrible, evil" villain, says the actor, who's set to tape his appearance in early 2004. "[Alias creator] J.J. Abrams is a fan of The Office and offered to write me a part," he says. In fact, Abrams is tailoring the role to Gervais's gift for subtlety. "A good bad guy doesn't have to be arch, over-the-top, mustache-twirly," Abrams adds. "A good bad guy needs to be smart. And certainly, Ricky is smart." Translation: Expect lots of awkward silences. (For more "TV News" scoop, pick up the new issue of TV Guide magazine, on sale Monday!)