First level of realism means selecting the right:
- Actors
- Props
- Location


Second level of realism means how the drama is filmed:
- Lighting
- Use of camera
- Choice of shot
- Music (non diegetic sound)
- Editing


Third level of realism:
- The finished product on TV
- Actual TV drama viewed by the audience
- Audience opinions of drama, do they believe it?


Diegetic sound - natural sound
Non diegetic sound - Sound added for audience effect (music, voiceover)
Emphatic sound - Exaggerated sound effect, edited over diegetic sound.