(film, television, radio) an assistant director

production

production

director (of a movie or television show) / conductor of a group of musicians

an assistant (person who assists)

participation, commitment

to participate, to join, to enter

movie, film

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend