How to Use a Transcript for a Mini-Play

In high school, the upper class directors of mini plays that usually have about four to five characters in the play last for seven to 20 minutes. Lower class when I heard people in the play, I wanted to take an episode from a TV series. Do you think I would be allowed to take the transcript and use it while still giving credit to the writers slash show slash act? Based on what you know so far, do you think I could do that?