NCIS has announced a 16th season renewal, as well as a new contract with the show's pillar actor Mark Harmon.　　NCIS is one of the few remaining longevity crime dramas, and it is also a public TV ratings giant crocodile, and the leading drama series of CBS TV. Of course, the actors and crew members have also changed one after another, and recently they have to send away the gothic appraiser Abby.