Fox Mulder (David Duchovny) and Dana Scully (Gillian Anderson) are brought in to investigate Surnow's death. Scully notes that another member of the research team, Arthur Grable, had mysteriously died several months earlier, and believes it could be a case of industrial espionage. Mulder examines the handwriting on the team's whiteboard and concludes that it has been written by at least four different people, leading him to suspect that a fourth individual was present. Keats and Nollette both inform the agents that Roland Fuller was the only one left in the facility at the time of Surnow's death, but do not believe him to be capable of murder.