Twenty
By the end of season 6 (May 2009) there were 138 episodes By the end of season 7, there were 162 episodes of NCIS. The season finale of NCIS was the last episode of season 7 'Rule Fifty-One' They are going to make season 8 of NCIS.
There are 3 episodes per season, but each one is 90 minutes long.
In Angel, season one, is 22 episodes.
There are 12 episodes in season 1
there are 13 episodes and one season.
season five, the same season were jenny shepard, director of ncis, dies.
there are 23 episodes in season 2 of one tree hill.
There was 22 episodes of season 1 of Nikita.
Twelve episodes for season one.
There are 10 episodes in season one.
There are 13 episodes in every season of Doctor Who.
13 episodes within one season .