What went down this week on television's most-watched program?

On NCIS Season 12 Episode 12, our favorite crime-fighting team searched for a home-grown terrorist following a rescue mission in Syria that revealed a U.S. citizen was involved in the capture of a social worker.

In what way? And how did guest star Joe Spano play a role, as he reprised the character of Senior FBI Agent T.C. Fornell?

There's one surefire way of finding out: Follow the prompts of the video below to watch NCIS online and make sure you are up to date on the latest happenings in this fun world.

Watch NCIS Season 12 Episode 12 Online

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.