THIS VOYAGE, the Treksperts MARK A. ALTMAN (author, The Fifty Year Mission, writer/ producer, Pandora, Agent X, The Librarians, writer/ producer Free Enterprise), DAREN DOCHTERMAN (associate producer, Star Trek: The Motion Picture - Director's Edition) and ASHLEY E. MILLER (showrunner; DOTA: Dragon's Blood, writer, X-Men: First Class, Thor) discuss TREK'S GREATEST GUEST STARS from The Original Series to Enterprise. Don't miss our not so super-sized countdown of Trek's best guests. NOTE: BOB JOHNSON was the voice on Mission: Impossible, not BART LA RUE.