Sergeant Blast and Private Meekley are two army soldiers, one a sergeant and the other a private, racing in an army tank/jeep hybrid with a small steamroller‘s wheel attached to the front.
The Army Surplus Special, otherwise known as the Surplus Six, made use of its tank facilities while racing, including its cannon, which could spin around to face forward or back, and the hatch, where Sergeant Blast rides. In one episode, the tank fired a bubblegum ball out of its cannon to stop Pat Pending (the first attempt backfired, but a second gum wad did prove successful). The Surplus Special was also equipped with a supply of land mines, which when driven over, would propel the car into the air, and also bazooka-like thrusters in the back, which provided speed boosts. Private Meekley is in charge of driving the vehicle while Sergeant Blast shouts orders. As their names suggest, Private Meekley is very meek and merely follows orders without question, while Sergeant Blast "blasts" orders with his stereotypical army-commander voice. a parody of Gomer Pyle.
Meekley has very bad habit of taking things literally and the wrong way, for instance, St Blast once ordered him to get to the finish line and "step on it" in which Meekley literally runs to the finish line and puts his foot down on it.
Sergeant Blast was originally voiced by Daws Butler, Greg Burson, and currently by Clancy Brown, while Private Meekly was originally voiced by Paul Winchell, and currently by Jim Cummings.
- When outside their car, Meekley is far taller than St Blast.
- St Blast and Meekley are the only drivers not named during the opening titles.