/ENG STER/SPAN DUB/ Equal parts JAG and C.S.I, NCIS does a formidable job of blending relevant military headlines with quirky characters who are tenaciously determined to solve a crime-even if it means having to sleep in the morgue to get a few minutes of shut eye. Created by Donald P. Bellisario (JAG, Quantum Leap), NCIS actually began as a two-part episode of JAG in 2003. Later that year, the drama made its full-season debut on CBS. On this six-disc set, which includes all 23 non-JAG