Walter "Doc" Hartford is a swashbuckling character who fights with a sword, a gun, and his fists. He is a computer genius who, along with the BETA Scientist 'Q-Ball', is responsible for most of the automated systems that the Galaxy Rangers use daily. His Series-5 implants allow him to communicate with and control special programs called 'tweakers', which appear as flying holographic computer animated geometric shapes. Ranger Hartford's implant produces the oddest effects - and they still cannot properly be explained. Commander Walsh puts it best: "Doc Hartford, your implant makes you a computer wizard, able to conjure fantastic programs."