John Sheppard (Stargate)

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John Sheppard
Joe Flanigan as John Sheppard
First appearance	"Rising" (Atlantis)
Created by	Brad Wright Robert C. Cooper
Portrayed by	Joe Flanigan
In-universe information
Species	Human
Occupation	United States Air Force Major Lieutenant Colonel
Family	Patrick Sheppard (father, deceased), David Sheppard (brother), Nancy (ex-wife)
Nationality	American

Lieutenant Colonel John Sheppard, USAF is a fictional character in the 2004 Canadian-American military science fiction television series Stargate Atlantis, which chronicles a civilian operation exploring the Pegasus Galaxy via a network of alien transportation devices. Portrayed by Joe Flanigan, Sheppard holds the military rank of lieutenant colonel in the series and is the second-in-command of the Atlantis Expedition following the death of Marshall Sumner (Robert Patrick) in "Rising".

Sheppard and Rodney McKay (David Hewlett) are the only characters to appear in all one hundred episodes of the series.