Claim: Abby Sciuto is a recurring character.

Abigail `` Abby '' Sciuto -LSB- ˈʃuːtoʊ -RSB- is a fictional character from the NCIS television series on CBS Television , and is portrayed by Pauley Perrette . In a season 10 episode entitled `` Hit and Run '' , a young Abby was played by Brighton Sharbino in flashbacks . Like Jethro Gibbs , Anthony DiNozzo , and Dr. Donald Mallard , Abby was first introduced in the episodes `` Ice Queen '' and `` Meltdown '' of the television show JAG -LRB- which together served as the backdoor pilot for NCIS -RRB- , and has appeared in every episode of NCIS , in addition to being featured on the show 's spin-offs , NCIS : Los Angeles -LRB- two episodes -RRB- and NCIS : New Orleans -LRB- two episodes -RRB- . The role has made Perrette one of the most popular actresses on U.S. primetime television in 2011 , according to Q Score .   Abby Sciuto is a forensic scientist at the Naval Criminal Investigative Service headquarters at the Washington Navy Yard , with expertise in ballistics , digital forensics , and DNA analysis . In the first episode of the seventh season , `` Truth or Consequences '' , DiNozzo , while under the influence of a truth serum , describes her as `` a paradox wrapped in an oxymoron smothered in contradictions in terms . Sleeps in a coffin . Really , the happiest Goth you 'll ever meet . '' Her gothic style of dress and her interest in death and the supernatural enigmatically contrast with her generally hyperactive demeanor and enthusiasm about her work .