Mark Robert Brown
Mark Robert Brown  is the former child actor who portrayed Don Linden in the  episode .

He filmed his scenes between Thursday  and Friday  at Desilu Stage 9 and Stage 10.

Following his appearance on Star Trek, Brown also has guest roles on the television series Lancer (1968, with Craig Hundley and Ken Lynch) and The Bill Cosby Show (1969).

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Performers
TOS performers