new spinoff set in Hawaii with showrunner Chris Silber. Deadline was first to report the cancellation news. one of CBS' biggest international hits and the most-watched series on TV, is a spinoff of and introduced several key characters, including Mark Harmon's Jethro Gibbs, in a two-episode arc in 2003. The flagship series, currently in its 18th season, later spun off in 2009, which is in its 12th season, and in 2014, currently in its seventh.