A sound analyst for "ShotSeeker", a NYPD acoustic surveillance system, Garvin has a very acute sense of hearing. His investigation into the disappearance of Krupa Naik lands him in the cross-hairs of Samaritan. He is disregarded as a threat by Samaritan after Finch and Root upload Naik's research online. Naik's body was later found by Detective Lionel Fusco and Martin LeRoux confessed to being her killer.
A friend and neighbor of Krupa Naik, she was in the possession of a hard drive containing Naik's research. Her number came up and she was killed by a Samaritan agent, but Root was able to recover the hard drive.
He is the head of an anti-hunger non-profit called "Feed The Globe". Krupa Naik planned to license her research to them to help feed millions of people around the world, but disappeared before the deal went through. After being questioned by Detective Fusco regarding Naik's disappearance Haas pointed them to JD Carrick.
The CEO of "Harvesta", he tried to buy Krupa Naik's research outright, but she chose "Feed The Globe" over them. Samaritan framed him for the disappearance of Naik as he had a history of making his opponents disappear.
A neighbor of Krupa Naik staying in apartment 4D, he berates Ethan Garvin for incessantly knocking on Naik's door and threatens to call the cops on him.
A NYPD officer, he pulls his gun on Ethan Garvin after "ShotSeeker", hacked by Samaritan, wrongfully identifies him as a shooter. He is stopped by Fusco.
A homeless man, he asks for some change from a passing Bruce Moran. His conversation is shown to be detected by "ShotSeeker" which is now being used by Samaritan.
