He is initially indirectly mentioned by Booth throughout Season 1's "The Soldier on the Grave" when Booth tells Brennan about killing Radik and his remorse about executing it in front of Radik's son, at the boy's birthday social gathering. HOW HE HAS SURROUNDED HIMSELF WITH Worse THAN SLAVES MINIONS WHO GIVE HIM Endless Ego Massage AND TELLS HIM ONLY WHAT HE LIKES TO Hear..