When Jack and Vaughn meet at the restaurant, Jack picks up his cup to pour himself some tea. When the camera angle changes while he's still pouring, the cup is sitting on the table.
Sydney tells Dr Kreshnik that she knows he is K-Directorate, based on his Georgian accent. In fact Evgeniy Lazarev who plays Kreshnik, does not have an accent when speaking Russian (nor should he, being an ethnic Russian). He speaks the Russian equivalent of Midwestern American English.