hear (something) through
To listen to something in its entirety. I know you're already angry, but please hear my apology through.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
hear something through
to listen to all of something. I would like you to hear this explanation through before making your decision. I won't have an opinion until I hear this through.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.