The Smoking Man (abbreviated to CSM, also known as Cancer Man or C.G.B. Spender), was a character played by William B. Davis on the 1993-2002 television series The X-Files.
The Smoking Man oversaw Scully's initial briefing on her assignment to the X-Files to debunk the work of FBI Special Agent Fox Mulder, as well as her debriefing. The Smoking Man also stole the evidence obtained by Mulder and Scully during the show's pilot episode, and moved it to a secret, underground storage room at the Pentagon. Although uttering only four audible words in the entire 1st season of the show, CSM eventually developed into the series' primary antagonist. The character is most commonly referred to by this description because he is almost always seen chain-smoking Morley cigarettes, and also because like other villains on the show, he has no known real name.
CSM's silent presence in Skinner's office early on was always a warning that the shadowy government attempting to discredit Mulder is again keeping an eye on the nonconformist agent.
