Before being approached by Desmond, Daniel Faraday spoke to a physics student of his. Faraday berated the student's work, insisting that he be "impressed", but that the student was failing to impress him. Crestfallen, the student walked away past Desmond as Desmond approached Faraday. ("The Constant") This character is an uncredited and unnamed background extra.
The physics student bears resemblance to Lost writer and co-executive producer Adam Horowitz, leading fans to speculate that Horowitz may have portrayed him in a cameo.