Alias2001

Sydney Bristow:
I have known Will for years. Trust me on this.

Jack Bristow:
There's another possibility... that the man we have in custody is not Will Tippin. Project Helix. The doubling prototype that you destroyed in Poland was designed to reshape a person's physical attributes to identically resemble someone else. The prototype's database revealed two scheduled recipients of the procedure: Dr. Markovic who was killed, and a second unknown individual.

Sydney Bristow:
You think Will is the double.

F.B.I. Asst. Director Kendall:
We found Provacillium in Will's car. It's a medication usually taken by gene therapy patients to keep the body from rejecting the DNA mutations.