Two props of the Orb were made. One of the prop Orbs was used for stunts and had retractable rods. A second version was manufactured from cast bronze, making it heavy: "You really didn't want to have to handle it," Campbell said. The rocket car seen in the pilot episode was built by special effects coordinator Kam Cooney and was a working vehicle with an internal combustion engine and throttle controls. Some items used in the show had been repurposed from older productions, and some would later be used in other shows. For example, the steam locomotive seen in the pilot episode was the same as the one used in "Back to the Future Part III". Two of Carry's prop guns – rifles whose barrels were sawed-off in fashion of the Mare's Leg – were later reused in the science fiction television series "Firefly".