Airdate: Sunday.12.October.2003

A fireball drops from the sky, devastating Moscow's Gorky Park. At the CIA,
Dixon explains the fireball was a falling satellite and that it nearly
prompted a nuclear response from Russia. Echelon picked up a call between
Sark and Boris Oransky, an employee at a French firm that built the
satellite. He and Sark discussed moving to "Phase 2." Sark has been
tracked to a Mexico City hotel. Dixon orders a team to follow him. Syd
believes they should apprehend him and argues with Lauren. Vaughn defends
Lauren, saying that capturing Sark will do nothing to shut down The
Covenant. Later, Vaughn asks a furious Lauren to give Syd the benefit of
the doubt.

Jack tells Syd that the NSC has murky footage of Lazarey's murder. He again
tells Syd not to admit her guilt because of the dangerous techniques the
CIA would use to extract her memories. Jack views the tape with Lauren and
Marshall, who requires 72 hours to make the tape clear for identification.

In Mexico, Syd, disguised as a Gaucho, locates Sark and Oransky in a cafe.
Oransky gives Sark photos and codes, and mentions the word "Medusa." Sark
leaves and Syd is discovered by Oransky's thugs. Oransky takes a hostage
and forces Syd to drop her gun. Marshall determines the frequency of
Oransky's earpiece and pushes 180 decibels of feedback through it. Syd
attacks the thugs but Oransky escapes.

Syd tells Weiss she remembers something about Medusa at SD-6. Weiss tells a
curious Syd that Vaughn met Lauren when she deposed during the
investigation into Irina's mother.

Dixon discovers that Medusa was an SD-6 project. It's an anti-satellite
weapon that can cripple a network of satellites. Oranksy destroyed the
Russian satellite to discover their protocol for nuclear attack. The
pictures Syd took reveal a motorcade to the Russian Science Ministry,
where Medusa is stored. Russia claims not to have anti satellites so the
CIA must get to it before Sark. Despite Syd's protests, they decide Sloane
can help them get into the Science Ministry.

Syd, Vaughn and Lauren travel to Zurich, where Sloane — who has a
relationship with the Ministry due to his cancer research — refuses to
help them. But after Syd threatens him, he agrees to admit them to a
Ministry banquet. Sloane taunts Vaughn and Lauren.

Meanwhile, Jack bribes computer expert Pierre Lagravanese to corrupt the
image of Lazarey's murder. Jack's given a virus, which he must upload to a
terminal with administrative privileges. He installs the files.

At the Ministry, Syd and Vaughn once again feel an attraction. Vaughn
creates a diversion, allowing Syd, who's stolen a diplomat's fingerprints,
to gain them unrestricted access. In an elevator, they change into Russian
military uniforms. Down in the bunker, Sark has murdered the guards.
Marshall and Dixon watch Lazarey's murder as Jack is corrupts the files.
The image won't render.

Syd and Vaughn engage in a firefight with Sark. He locks them in a sublevel
and disconnects the elevator. Oransky goes after Syd while Sark bolts. Syd
and Vaughn rig the generator to blow and crawl out intake vent as Oransky
is killed and Medusa is destroyed. Weiss gives her a 3rd edition of Alice
in Wonderland, a favorite of Syd's that was destroyed when her apartment burned.