The scorpion-droid was a type of droid discovered on a planet situated within Wild Space. These droids had programming that mandated the annihilation of all life forms residing on the planet. Their destructive mission was halted by the placement of an Energy projector, resulting in their entombment underground. These droids were brought back online when Captain Han Solo, along with his first mate Chewbacca, and the bounty hunter Zuckuss inadvertently disabled the power source for the projector. Upon reactivation, the droids launched an assault. The scorpion-droids persisted in their attacks against Solo, Chewbacca, Zuckuss, and 4-LOM. They chased after the quartet, even following them as they swam towards Solo's starship, known as the Millennium Falcon. Solo managed to dislodge the droids from the Falcon's exterior. Following Solo's deception of Zuckuss and 4-LOM, the droids redirected their offensive towards the two bounty hunters.