<Tr> <Th> Years of Service </Th> <Td> 2003--Present </Td> </Tr> <P> Timothy "Tim" Farragut McGee (/ mæˈɡiː, mə - /) is a fictional character from the CBS television series NCIS . He is portrayed by Sean Murray . McGee specializes in cybersecurity and computer crime, and is a graduate of Johns Hopkins University and MIT . </P> <P> Murray appeared as a guest star in eight episodes of the first season of NCIS; in season two he joined the main cast and was added to the opening credits . </P> <P> McGee was born in Bethesda, Maryland, on September 13, 1978, to an Irish American family . He spent his childhood in Alameda, California, as his father was a naval officer stationed there . His parents bought him his first car--a 1984 Camaro Z28 5 - speed--the day he turned sixteen . However, he crashed into a bus while trying to figure out how to use the windshield wipers . He got a student pass the day he got out of traction . He earned a Bachelor of Science degree in biomedical engineering from Johns Hopkins University and a Master of Science degree in computer forensics from MIT . His college GPA was 3.9, as he failed a fencing class in his sophomore year . He worked at the NCIS field office in Norfolk, Virginia, before being transferred to the headquarters in the Washington Navy Yard, a move made permanent at the end of the season two episode "See No Evil ." </P>

What episode of ncis does mcgee join the team