|First Appearance||Collateral Damage|
|Last Appearance||At All Costs|
|“||Stop! My head is going to explode from that.||”|
— Markley about maths.
Markley accompanied Matt Mason and Billy to blow a hole in an abandoned house. Markley handed Matt the dynamite. As Matt sarcastically worried about missing it, Markley told him to stop claiming his head was going to explode from the math. Markley then gave Matt the match to light the dynamite. Markley called Billy a wimp for worrying they might get in trouble. After the explosion Markley excitedly claimed that it was epic. Billy was proven correct as they were soon caught by several soldiers who thought they were under attack.
Later after the attack on Charleston, Markley helped Matt clean up the debris. He thought it would be cool to have 6 legs, for which Matt called him weird and Tommy thought it was gross. He tried to defend himself saying it would be cool to climb walls and jump over buildings. Matt quickly stopped him.
When the 2nd Mass was returning to Charleston after 22 days, the Espheni attacked, deploying Mega-Mechs, Beamers, and Obelisks. With the 2nd Mass separated, most of the remaining survivors from the attack are being held in the Ghetto Camps in Charleston, run by the Espheni and the kids taken to re-education camps; leaving his fate unknown.
|Season 3 appearances|
|On Thin Ice||Collateral Damage||Badlands||At All Costs||Search and Recover|
|Be Silent and Come Out||The Pickett Line||Strange Brew||Journey to Xilbalba||Brazil|