Eric Weiss was an experienced agent working for the CIA. He was close friends with Michael Vaughn whilst they both worked at the CIA office in Los Angeles and often chided him about his clear feelings for Sydney Bristow when he was her CIA handler. He continued to work for the CIA after the takedown of SD-6 alongside new recruits including Sydney, Marshall Flinkman and Marcus Dixon.

He was not initially recruited to work at APO as other CIA agents were, but after seeing Vaughn and Syndey (after they supposedly "quit" the CIA; part of their cover to join the black-ops division that was APO) he joined their organization. He began a romantic relationship with Nadia Santos, Sydney's half-sister. Weiss received a promotion with the NSC as the Covert Operations Coordinator, and so left APO.

Personal Information

  • ID-CLASS: USS-CI-2300784
  • Present Location: Los Angeles
  • Date Of Birth: 04/17/68
  • Place Of Birth: Los Angeles, CA, USA
  • Height: 6'1"
  • Weight: 200
  • Languages: English, Spanish, Dutch
  • Education: BS. Economics
  • Experience: Recruit, 11-1997


  • Girlfriend: Nadia Santos (deceased)
  • Mother's Maiden Name: Blumberg

Work for the CIA

Season 1

Season 2

Season 3

Season 4

Work for APO

Season 4

Season 5

Work for the NSC

Season 5


Michael Vaughn

Nadia Santos



  • Weiss is a descendant of Harry Houdini (whose real name was Ehrich Weiss). He mentions this to Will Tippin, who recognized the name, and to Nadia Santos as he's performing some sleight of hand to impress her.
  • Although Weiss is a recurring character in the first season of Alias, Greg Grunberg's name, for unexplained reasons, does not appear at all in the credits of each episode he appeared in during that season. See character appearances to view his episodes.