He was a member of Tomas' Hole-in-the Wall gang. He was captured during one of their robberies and presumed to have been killed in prison. In fact he faked his death and escaped from prison. Holding a grudge against Tomas he used him and his old gang to steal the Marburg virus for an unknown buyer and later killed two of the members Henrik and Max. He later confronts Tomas when he and Shaw broke into the storage holding the virus and tries to inject him with it to start a pandemic on behalf of his employer. After a brief fight he is wounded by Shaw and later killed by Brooks.
A member of Tomas' Hole-in-the Wall gang, he was hired by Marko to steal the Marburg virus. He betrayed Tomas and stole the virus to hand it over to Marko but was in turn betrayed by him and killed along with another member of the gang, Max.
A software engineer who had recently received a $12 million grant from newly elected New York Governor Nick Dawson to set up a charity called One Tablet Per Student, which plans to issue a tablet to every student in the state. Fearing that this was part of Samaritan's plan of furthering its influence, Root went undercover as his son's nanny and with the help of Finch sabotaged the project. Finch later expresses his doubt if they did the right thing.
An IT maintenance guy who received a text message from Samaritan offering $3000 if he can fix the internet at Sebastian Wilkins' office. He arrives at Wilkins' office after Root sabotaged the servers in order for Finch to implement a worm which would destroy the OS on Wilkins' tablets.