Emily Wickersham 's now a series regular on `` NCIS '' She was originally supposed to appear in only three episodes . The show is based around the character of FBI Special Agent Leroy Jethro Gibbs, played by William Devane.
Emily Wickersham 's now a series regular on `` NCIS '' She was originally supposed to appear in only three episodes . Her promotion follows the exit of Cote de Pablo .