NCIS: Origins has introduced the origin story behind several of Gibbs’ most vital characteristics and his first elevator trick has surprisingly deeper ramifications. In NCIS, Mark Harmon’s Gibbs already has a strong personal history that has shaped his ever-growing list of rules, but in NCIS: Origins, these rules unfold as the episodes occur in real time. One of Gibbs’ most important rules actually has its start in Gibbs’ first elevator trick in NCIS: Origins episode 3.