Tonight is Part 1 of "The Family That Slays Together, Stays Together", the season finale of The Venture Bros. Season 3!!
It's on at 11:30 on Adult Swim tonight, or check it out on the Adult Swim website. The website also has an additional prologue which is absolutely great!
Be sure to check it out, and if you don't watch The Venture Bros. you need to get on that ASAP!