The Venture Bros.: All This and Gargantua-2 is an animated television special part of The Venture Bros. animated television series. It aired on January 19, 2015.
Starring
- James Urbaniak - Dr. Venture, Jonas Venture Jr., Phantom Limb, Bowie Sovereign
- Patrick Warburton - Brock Samson
- Mike Sinterniklaas - Dean Venture, OSI Soldiers, Security Guard
- Chris McCulloch - Hank Venture, The Monarch, Action Man, Col. Gentleman, Sgt. Hatred, Col. Hunter Gathers, Dr. Henry Killinger, Sovereign Head, Dragoon, Dr. Z, Watch, Pirate Captain
- Doc Hammer - Dr. Mrs. The Monarch, Henchman 21, Billy Quizboy, Shoreleave, Rose, Ward, Investor 1, Red Mantle, Dermott
Guest Starring
- Stephen Colbert - Prof. Impossible
- James Adomian - Phineas Phage, Lawyer
- Mia Barron - Sally Impossible, Airport P.A.
- Paul Boocock - Jonas Venture Sr.
- Paget Brewster - Amber Gold, Mommy Long-Legs
- John K. Hodgman - Snoopy, Investor 2
- Toby Huss - General Treister
- Larry Murphy - Monseñor, Don Hell's Bouncer, Newscaster
- Charles Parnell - Jefferson Twilight
- Steven Rattazzi - Dr. Orpheus
- Brendon Small - Hector, Swifty
- T. Ryder Smith - Baron Ünderbheit, Investor 3
- Dana Snyder - The Alchemist