I'm a little confused!Do you know who the Alpha is?

Alpha was the guy at the end of the pilot who sent a photo of Echo/Caroline to agent Paul Ballard.
He was a Doll until he went bad and attacked other dolls and staff at the dollhouse and then escaped, and nobody knows why he left Echo alive.

What the dollhouse do is illegal, they seem to get people who are in very difficult situations and offer them the solution of becoming dolls to escape and after 5 years be released and paid well (though fans are speculating about whether they force people into bad situations, or don't release them at all, but that hasn't been covered in th show yet.)

The guy who tried to kill Rayna is not Alpha, that was an obsessive fan of hers.

The FBI agent formerly known as Romo Lampkin is most likely Alpha.

Go to the 2nd page of the Dollhouse Links and there is a headline saying "Alpha has been cast" (or something like that). Click on the link and see the answer for yourself. ;)

We as viewers have yet to be given the identity of Alpha yet. We know what he has done at the Dollhouse and that he escaped. His where abouts are still unknown though. The formentioned article says who is going to be playing this Doll, but we have not seen or truly heard from him yet. It is believed that he is the one sending the photos to the FBI guy. But now I think it might be the person in the Dollhouse that is sending him messages through Echo. I love this show. It keeps you guessing.