Non-descript

N.D. (or ND) is a casting abbreviation for "non-descript". For example: “Joey Sakata as Engineering N.D.”
This term is used when the show requires extras that will add to the realism of the scene, but won't distract the audience from the main characters and story.
Selected instances are:
* the sickbay crewmembers in 
* the engineering crewmember in (co-stars)
* the alien pilgrim in 
* the Triannon bomber in (co-stars)
Category:Production material