Major Arthur commands the Special Operations Forces tasked with containing and eliminating the rogue M-66 military androids, consistently identified by his rank. After the androids escape from a crashed military transport near Center City, he directs retrieval efforts, establishing a cordon around the forest crash site.

Upon learning the androids target Professor Matthews' granddaughter Ferris for assassination, he prioritizes neutralizing the threat and protecting civilians. He coordinates tactical operations against the androids, setting traps to intercept them before they reach the city. His forces sustain heavy losses during direct confrontations.

Arthur authorizes experimental magnetic technology to disable the androids, adapting his tactics. This partially succeeds, enabling his team to capture one unit before its self-destruction causes additional fatalities. Despite setbacks, he persists, regrouping his forces and calling for aerial transport to continue pursuing the remaining android.

When the android attacks in the city, his forces provide defensive support to journalist Sybel and Ferris, though they prove ineffective. After Sybel destroys the final android and rescues Ferris, Arthur oversees their extraction via military aircraft during the building collapse.

In the aftermath, he exercises discretion, choosing not to arrest Sybel for her interference while acknowledging her role in resolving the crisis. He confiscates her journalistic equipment as part of a military cover-up that publicly attributes the incident to terrorism.