A
Visitor, Martin was a member of the Fifth Column, a group of Visitors aboard
the Motherships who were opposed to the Leader's invasion plans.
Working closely with Diana, Martin was able to provide Mike with details
on Diana's plans and attacks. He provided Visitor uniforms for the
Resistance, and assisted in the final raid on the LA Mothership.
Martin also voluntarily stayed on Earth after the Visitor retreat. He became the soundman for Mike Donovan, and remained close to the Resistance. While Donovan and Martin were tracking Diana's whereabouts, Diana overpowered Martin and took his last vial of red dust antidote. Martin died shortly before the Second Invasion.