Each of the regular characters (and many of the recurring ones as well) have been প্রদত্ত backstories; and the প্রদর্শনী has a commitment to plot and character continuity that would rival any live-action series.
Give it up to another series of animation, action and comedy back to its third season. The সেকেন্ড part is entitled "Heart of Malice: Part I" and will air on September 15, 2011.