The passengers on the plane were a 'captive audience'. [=the passengers on the plane could not leave and had to listen to what was being said]
Enemy forces took/held them 'captive'. [=took or kept them as prisoners]
The 'captive' soldiers planned their escape.
(..) up there later? A microphone, a room full of inaccurate depictions of Polynesian religion, and a captive audience to hear about it? You bet I am. I'm sorry I freaked out this morning. I want you to know... I'm done being scared. (..)2016 TvShow: The Big Bang Theory Title: The Positive Negative Reaction Season: 9 Episode 16