Julian Sark is a recurring fictional character portrayed by David Anders on the ABC television series Alias.

[1][2] The series follows Sydney Bristow, an operative working for an organization called SD-6 which she believes is a covert branch of the Central Intelligence Agency.

However, she learns it is actually a subsidiary of the Alliance of Twelve, a crime syndicate which seeks to make profits from stolen intelligence and artifacts.

Julian Sark is introduced in the first season's fourteenth episode, "The Coup", where he is seen meeting the head of K-Directorate in Moscow on behalf of the person known only as "The Man" who intends to purchase Rambaldi's journal.

The last one is the series finale, "All The Time In The World", in which Marcus Dixon asks Sydney to intercept Sark as he attempts to sell a stolen hard disk containing classified information.

Sark is seen initially operating as an agent of a criminal organization headed by a mysterious figure known only as "The Man" (believed at first to be Alexander Khasinau but later revealed to be Irina Derevko).

Sydney is further tasked by Vaughn to switch out the document with a counterfeit, but is unable to because she spots Will Tippin, who's been brought to Paris to meet a mysterious contact to discuss "The Circumference," in the club.

While SD-6 is on a wild goose chase to Switzerland, Sark actually returns to Los Angeles and kidnaps Will Tippin from a CIA safehouse.

Sark initially assumes control of Irina's assets but later allies with SD-6, but secretly collaborates with Sloane to provide Sydney with the location of "Server 47," on which is housed enough intelligence to bring about the destruction of The Alliance of Twelve and all SD cells.

These funds are seized by the Covenant in exchange for his release from CIA custody and Sark, despite having provided much of the organization's operating capital, feels he is relegated to the status of "foot soldier."

Sark carries out missions for the Covenant, sometimes with the aid of Lauren Reed, a double agent positioned within the NSC and married to Vaughn.

With the apparent destruction of Project Helix, Doren is trapped in Francie's form but Sark, who claims to love her, says it doesn't matter.

Sark and Reed become lovers and eventually conspire to assassinate the leaders of the six Covenant cells in an attempt to take control of the organization.

Reed carries out a mission wearing a mask to impersonate Sydney to obtain the equation from the CIA and plant a bomb in their headquarters, while Sark monitors her remotely.

During his second CIA-imposed imprisonment, Sark is released into the custody of Sydney and Vaughn to help track down terrorist Anna Espinosa.

He agrees to help but demands to see proof that Lauren (whom, Allison notwithstanding, Sark also claims is "the woman [he] loved") is in fact dead.