In the final moments of a cooperative mission, Sydney and her Russian nemesis Anna memorize a 500-year-old binary code written by Milo Rambaldi before it is destroyed. Sydney isn't sure if she should give the correct sequence to SD-6 but Vaughn makes it clear that her role as a double-agent is in constant jeopardy.

The completed code represents a geographical location for a church in Málaga, Spain, where Sydney and Anna meet as enemies. Sydney bests Anna in a brutal fight, and recovers a gold circular crystal from the church's stain glass window.

She returns to SD-6, where Marshall's analysis discloses a pre-synthetic polymer, also invented by Rambaldi. The 15th century seer's progressive inventions now appear to be at the root of a much deeper mystery.

Sydney and Dixon are sent on a mission to investigate a plot to eliminate the United Commerce Organization. In Casablanca, Morocco, Sydney adopts the guise of a French-Canadian tourist.

In a crowded marketplace, she attempts to get near Luc Jacqnoud, whose bodyguard recognizes her from a previous encounter in Corsica. After a battle, Sydney arrives to Dixon's aide, and is crushed to find that their contact — and friend — Bak Ibrahim, has been slain.

At SD-6, Jack is interrogated by McCullough but we reveal, in a dreamlike sequence, that a unspoken truth about Sydney's mother continues to haunt him. Meanwhile, Vaughn's feelings for Sydney, in a moment of briefing, show through even further, finally, when she breaks down to him about the heartbreaking conflicts in the career of a dual agent, Vaughn offers her his support as a friend

Meanwhile, Francie's suspicions grow of Charlie's infidelity, so she and Sydney stake him out until they spy him kissing another girl. Will unravels further clues about Danny's death and struggles with his own feelings for Sydney.

SD-6's latest clues lead Sydney and Dixon to São Paolo, the location of the next United Commerce Organization conference, where Sydney witnesses the method to Jacqnoud's scheme. Dhiren Patel, the Peace Prize winner, is scheduled to speak at the UCO conference, but collapses at an evening social where men impersonating paramedics take him away. Sydney watches from the rooftop as a tiny bomb with a charge equivalent to 300 pounds of TNT is surgically implanted into Patel's pacemaker.

From ABC.com

My favourite scenes in this episode both involve Sydney and Vaughn.
The car wash scene "You thought I was married this whole time" :lol:, and the pier scene which was very sweet :)
The outfit that Syd wears at the end was vile, gold trousers :x

Ooh ! All the scenes about what Jack is really hiding ! :fear:

I love how Sydney`s secret life is now colouring her life with her friends ; hiding the suitcase address label, spying with Francie.

Love the Sydney and Vaughn scenes, too - especially the pier scene, with the juxtaposition of her being nutty and over-emotional and him being calm and reaching out to her emotionally - love his speech ! :thumbsup:

They were hideous, weren`t they ? :o A failed attempt at doing a Kylie :lol:

Vaughn was so sweet with Syd in this ep - think I have a new crush!! :wub:

I also liked how it was starting to effect life with her friends; getting frustrated with Will snooping around tho - I just have visions of it all ending in tears (nobody tell me if it does please!)

The outfit is bluergh but I love how she changes her personality to match each outfit she wears, if that makes sense!!! Costume and make up must have to be on the ball to come up with a new look for her each week - whats Alias in now - fourth season - how many hairstyles is that :lol:

Yup, it`s a wigfest alright ! :rolleyes: