 However, he is killed in the season one finale, "The Erlenmeyer Flask", for helping the agents and the X-files are shut down.In the second season (199495), Mulder is operating as a general assignment agent when he receives an anonymous phone call from a mysterious man who tells him that the X-Files have to be reopened.Once the two later met, the mysterious man claimed that the government conspiracy had killed "Deep Throat", closed down the X-Files and separated the agents assigned to the cases as an initial attempt to secure the truth they were hiding.