Question: How many episodes of ncis have there been?
Disambiguated questions and answers: question: How many episodes of ncis have there been by the end of 2017?
How many total episodes of ncis have there been by the end of season 14?
How many total episodes of ncis have there been by the end of season 13?
answer: 340
330
306
Natural Questions answer: 354 (from the Wikipedia article "List of NCIS episodes")