characters. Various characters have been inside at one point or another; namely Tony DiNozzo, Ziva David, Caitlin Todd, Sarah McGee, Abby Sciuto and Abby's previous boyfriend/stalker, Mikel. In the Season 9 episode, "Life Before His Eyes" Abby and McGee are shown as a happy couple in the alternate reality scenarios. Dr. Donald "Ducky" Mallard Ducky is one of the few individuals to use McGee's full given name of Timothy as illustrated in "See No Evil". As with Abby, Ducky at times adopts a fatherly attitude towards Tim as demonstrated in the season four episode "Smoked". Ducky's fatherly relationship with McGee mellows into one of mutual respect. Director Vance In the episode "Collateral Damage" a discussion occurred between Gibbs and Director Vance about the ideal qualities an NCIS agent should possess. Director Vance told Gibbs that in his view, McGee exemplified the model NCIS agent, in sharp contrast to Gibbs who prefers agents in the mold of DiNozzo. During "Enemies Domestic", McGee seemed pretty shaken-up and almost distraught after seeing the extent of Vance's injuries following the explosion. Family Several members of McGee's family have appeared in the series over the years. His younger sister, Sarah, first mentioned in the Season 2 episode, "See No Evil", plays a prominent role in the fourth season episode "Twisted Sister". The two differ greatly in personality but are still very close. McGee helps clear Sarah as a potential murder suspect and is willing to risk his NCIS career to do so. Sarah McGee is portrayed by Troian Bellisario, Murray's real-life step-sister, and daughter of series creator and former executive producer Donald P. Bellisario. In "Hide and Seek", it is revealed that McGee's father is a naval officer, and stationed in California. In "The Penelope Papers", it is revealed that McGee's maternal grandmother, Penelope Langston (played by Lily Tomlin) is still alive and was close to McGee when he was young. While talking to Penelope, McGee reveals that he and his father have not spoken in seven years; Penelope and McGee agree that McGee's father is like Gibbs, in that both love McGee, but have difficulty expressing their affection. The casting of Jamey Sheridan as McGee's father was announced in February 2013. The role was described as "complex and layered" by executive producer Gary Glasberg, and in the late March episode "Squall", Sheridan appeared as Admiral John McGee. The admiral is initially considered as a