Alias (2001)

S1E5 Doppelgänger

Sydney's covert role as a double agent is put at risk when she sneaks a biotech engineer into SD-6 following her assignment in Berlin. Meanwhile, Will encounters a woman who reveals she had been involved with Danny just before his tragic demise. In another twist, Vaughn shares unsettling news with Sydney, suggesting that her father might be collaborating with a third clandestine agency.