|First Appearence:||A Free Agent|
Neil Caplan was a mathematician who was kidnapped by Julian Sark. He was also an undercover NSA agent.
While at an aquarium during his son's birthday, Neil was seen working on a code while talking to his wife, Elsa. The two began to argue because Neil was spending more time working and less time with his son. After the argument, the two were shocked to see that Aaron had gone missing and was nowhere to be found. Elsa went off into a section of the aquarium while Neil went another way, encountering Julian in the process. Julian said he'd be able to help Neil find his son...and his wife.
After getting captured, Neil was taken to a warehouse and was ordered by Sloane to help him build a Rambaldi artifact. Even though Neil felt like he had been captured, Arvin assured Neil that he was actually helping himself. Neil didn't want to help Arvin until his family was released, but Arvin changed his mind when he heard his wife's pleas. Neil told Arvin that it wasn't possible to build the artifacts unless he had magnetometer. Arvin told Neil it was in the vault of Amcore Bank and he leaves Neil to go steal the magnetometer.