Syd's new love ineterest makes his first appearance in this eppy. And according to some other spoilers they were "together" somewher during those two years, so maybe he is the missing link
Just my opinion
i wonder who this missing link person is. it's probably someone from the covenant. maybe it's sark for some odd reason. THAT WOULD BE AWESOME!!!!!!! as long as Irina isn't his mommy. (we already found out who his dad was)