Mary is a fictional character portrayed by Pamelyn Ferdin in the TV series Star Trek.
In the first episode they appeared in, titled And the Children Shall Lead (season 3), they were 9 years old.
They appear in 1 episodes out of a total of 79 aired
Episodes1
And the Children Shall Lead
episode S3.E4 october 1968The Enterprise reaches a Federation colony where the adults have all killed themselves but the children play without care.