Eric Weiss is a fictional character, played by Greg Grunberg, from the television series Alias. He is one of Sydney Bristow's CIA co-workers.
Eric Weiss was a field agent at the CIA. He is a friend of most of the people at the CIA and often gives advice to the other characters, as an outside observer to all of the personal goings-on at the CIA. Weiss has a wry and sarcastic sense of humor which often comes out in his observations. He often walks into or defuses tense situations between Sydney and Vaughn. He is a descendant of Harry Houdini (whose real name was Ehrich Weiss [or Weisz]).
He initially served as a humorous foil and sounding board for Michael Vaughn in the first season, but with the integration of the former members of SD-6 and the CIA, he gives advice to many of the other characters, including Sydney and Marshall Flinkman.
When Marshall's fiancée, Carrie Bowman, went into labor at CIA headquarters, she insisted on being married before the baby was born. Marshall quickly accessed the website for the dubious "Internet Church of Mammals" and obtained for Weiss the post of "Exalted Minister", which allowed him to officiate at the impromptu wedding.