Jeremiah Smith (The X-Files)

William Scully Jr.
The X-Files character
First appearance	"Memento Mori" (cut scenes)
Portrayed by	Pat Skipper
Date of Birth	around 1961
Information
Occupation	Military officer
Family	Tara Scully (wife) Margaret Scully (mother) William Scully (father) Melissa and Dana Scully (sisters) Charles Scully (brother)
Children	Matthew Scully (born c.1997)

Margaret Scully
The X-Files character
First appearance	"Beyond the Sea"
Portrayed by	Sheila Larken
Date of death	c. February 9, 2016
Information
Occupation	Housewife
Family	William Scully (husband), Tara Scully (daughter in law), Matthew and William Scully (grandsons)
Children	William, Melissa, Dana and Charles Scully

Cassandra Spender
The X-Files character
First appearance	"Patient X"
Portrayed by	Veronica Cartwright
Information
Family	CGB Spender (ex-husband)
Children	Jeffrey Spender

William Scully
The X-Files character
First appearance	"Existence"
Portrayed by	multiple babies (including James and Travis Riker)
Date of birth	c. January, 2001
Place of birth	Democrat Hot Springs, Georgia
Information
Occupation	Student
Family	Dana Scully and Fox Mulder (biological parents), The Van de Kamps (adoptive parents)

The American science fiction television series The X-Files featured a range of minor characters who appeared in multiple episodes. The following list includes those characters who made several appearances in the series in minor roles. These characters helped to expand the series' overarching mythology, or fictional history.

Section Chief Scott Blevins is portrayed by Charles Cioffi. Blevins was a top official in the Federal Bureau of Investigation who was bankrolled by Roush Pharmaceuticals, the same group that bankrolled Michael Kritschgau. In 1992, then Division Chief Blevins assigned Dana Scully to work with Fox Mulder on the X-files, cases that involved paranormal or unexplained phenomena. Blevins believed that Scully would help provide a more scientific analysis of the X-files cases.

The following year, Blevins recommended that Mulder be removed from the X-files due to Mulder's personal agenda regarding the cases. Later that year, Section Chief Joseph McGrath went over Blevins's head in an attempt to order a shut down of the X-files. Mulder and Scully would be later placed under the supervision of Assistant Director Walter Skinner, and Blevins would be placed in the position of Section Chief.

In 1997, Blevins led a joint FBI committee that was investigating the legitimacy of Mulder's work on the X-files and his apparent suicide. After Mulder was discovered alive, he testified before the committee naming Blevins as the FBI mole responsible for giving Special Agent Scully cancer and working with the government conspiracy. Blevins was subsequently killed by another member of the committee who made his death appear to be a suicide.

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Wikipedia