(written from a Production point of view)
Jonathan "Jon" Dweck (born 28 June 1959; age 60) was a child who portrayed an Only in the Star Trek: The Original Series first season episode "Miri". Jonathan Dweck is the youngest son of Grace Lee Whitney and Stevan Dweck, Ph.D. and brother of Scott Dweck. The family grew up in Los Angeles, California. Dweck chose a career as a science teacher, which he has taught for nearly 30 years.