Smythe was severely injured during the Armageddon mission to acquire Vacuum Power Modules (VPMs). He lost both legs below the knee. He tells Skippy the Magnificent that rather than regrowing his legs, he be given mechanical legs instead. During his recovery, Major Kapoor took temporary command of the STAR team.
Smythe eventually had his legs regrown and continued to lead ST-Alpha.
He has been certified crazy by Colonel Joseph Bishop.