<Table> <Tr> <Th_colspan="2"> Carl Gerhard Busch aka Cigarette Smoking Man </Th> </Tr> <Tr> <Td_colspan="2"> The X-Files character </Td> </Tr> <Tr> <Td_colspan="2"> William B. Davis as Cigarette Smoking Man </Td> </Tr> <Tr> <Th> First appearance </Th> <Td> "Pilot" (September 10, 1993) </Td> </Tr> <Tr> <Th> Last appearance </Th> <Td> "My Struggle IV" (March 21, 2018) </Td> </Tr> <Tr> <Th> Created by </Th> <Td> Chris Carter </Td> </Tr> <Tr> <Th> Portrayed by </Th> <Td> William B. Davis Chris Owens (younger) Craig Warkentin (younger) </Td> </Tr> <Tr> <Th_colspan="2"> Information </Th> </Tr> <Tr> <Th> Occupation </Th> <Td> Department of Defense Syndicate member Men in Black Case Officer Assassin </Td> </Tr> <Tr> <Th> Family </Th> <Td> Cassandra (ex-wife) Jeffrey Spender (son) Fox Mulder (son) William Van de Kamp (son / grandson) </Td> </Tr> <Tr> <Th> Alias </Th> <Td> C.G.B. Spender </Td> </Tr> <Tr> <Th> Affiliated with </Th> <Td> Colonists Central Intelligence Agency National Security Agency Federal Bureau of Investigation, The X-Files The Syndicate </Td> </Tr> <Tr> <Th> Duration </Th> <Td> 1993--2000, 2002, 2016, 2018 </Td> </Tr> <Tr> <Th> Films </Th> <Td> The X-Files </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Carl Gerhard Busch aka Cigarette Smoking Man </Th> </Tr> <Tr> <Td_colspan="2"> The X-Files character </Td> </Tr>

Who is the cigarette smoking man on the x files