The Venture Bros: Season 4, Episode 9

4 - 9: The Diving Bell vs. The Butter-Glider

Brock, Hank, and Dean must go on a fantastic voyage into Rusty's brain to find out why he's in a coma. Meanwhile, Henchman 21 demands new henchsuits, but the Monarch is too busy obsessing with his latest purchase, a butter-glider.