Tony's cousin Tony Blundeto (played by Steve Buscemi) offed Phil's brother in Season Five and to make amends with NY Tony popped his cousin in the head with a shotgun. Seems like Phil is still catching feelings over it, though.
Good epsiode, did a nice job of sowing the seeds of mistrust in Tony's head in regards to Christopher wanting to take over his spot. Really weird to see Sydney Pollack in that kind of a guest role but he did well and the interactions with Johnny were nice. Speaking of, weird to see him go in such an anticlimactic way but the scene that followed with Tony receiving the news at the Bing was tremendous, you could just see Tony looking around wondering how everybody is going to react when they found out he's gone.