Leo G. Carroll did it in 1966. Lisa Bonet sort of did it in 1987. What am I talking about? Double duty. That is, playing the same role on two series which are running at the same time. There are probably quite a few other instances, but Leo was head man Mr. Waverly on both The Man from U.N.C.L.E. and The Girl from U.N.C.L.E. for a year, and Lisa was Denise Huxtable in college (A Different World) and when she came home to visit the family in Brooklyn on The Cosby Show.

Now, Rocky Carroll will appear on both NCIS shows. Doing double duty makes perfect sense for the NCIS twosome, especially since they're going to be airing back to back on Tuesday, 8-10 P.M.