NCIS: Los Angeles - Tin Soldiers

An OK episode of NCIS where we are given a hint at a reveal of Callen's past but it doesn't come to anything, ripped off! A man breaks in to Callen's house and is apprehended and he turns out to be someone meant to bring Callen to Russian ex-KGB operative Arkady.  He tells Callen about a man bringing in illegal microchips and wants Callen to help him stop him in return for information on someone from his past.  He is really just wanting to get rid of the competition.  As I said, a fairly run of the mill episode.