The title of this episode, "Fire and Blood", is the Targaryen family motto. Each noble family has its own motto. For example, "Winter Is Coming", the title of episode 1 of season 1, is the Stark family motto.
Kevan Lannister: Perhaps we should sue for peace.
Tyrion Lannister: (knocks a glass cup on the ground) There's your peace. (gestures to the broken cup) Joffrey saw to that when he decided to remove Ned Stark's head. You'll have an easier time drinking from that cup than you will bringing Robb Stark to the table now. He's winning, in case you hadn't noticed.
Robb Stark: (after discovering that the Lannisters have beheaded his father) I'll kill them all. Every one of them. I'll kill them all.
Catelyn Stark: My boy. They have your sisters. We have to get the girls back, and then we will kill them all.
Greatjon Umber: My lords, here is what I say to these two kings. (spits) Renly Baratheon is nothing to me, nor Stannis neither. Why should they rule over me and mine from some flowery seat in the South? What do they know of the Wall or the wolfswood? And their gods are wrong. Why shouldn't we rule ourselves again? It was the Dragons we bowed to, and now the Dragons are dead. (unsheathes his sword and gestures to Robb Stark) There sits the only king I mean to bend my knee to. The King in the North!
The DVDs to season one were are recalled due to the scene in this episode where all the severed heads are shown because one of them bared a resemblance to former president George W. Bush. The head was digitally removed in subsequent publications.