The Fourth Season of Castle continues to build on the already successful three seasons beforehand. The relationship between Castle and Beckett continues to deepen and reaches new heights. The superb supporting cast are joined by Penny Johnson Jerald as Captain Victoria “Iron” Gates, who replaces the late Captain Roy Montgomery. Look out for the episode titled “Kill Shot”, which is a fantastic (and award winning) depiction of Post Traumatic Stress Disorder. Also look out for the Season Finale “Always”, which left cheers of delight from Castle fans all over the world!