captive audience

Translations
пленённая аудитория
The passengers on the plane were a captive audience for the in-flight movie.
Пассажиры в самолёте были пленённой аудиторией для фильма, показываемого на борту.
Definitions
A captive audience refers to a group of people who are unable to leave or avoid listening to a speaker or presentation, often because they are in a controlled environment or situation, such as a classroom, a waiting room, or during a performance.
Words
captive

adjective
невольный
audience

noun
аудитория