John Franklyn-Robbins
You may be looking for American actor John Franklin.
John Franklyn-Robbins  was a British actor, who played Macias in the  seventh season episode .

Between 1955 and 2007, Franklyn-Robbins appeared in many television series such as Z Cars, Softly Softly, Special Branch, Paul Temple, Play for Today, Casualty, and Midsomer Murders as well as the voice of the Dream Maker in the animated series The Dream Stone. His film roles include the animated movie The Plague Dogs, Dr. Jekyll and Ms. Hyde, Vanity Fair, and The Golden Compass.

Franklyn-Robbins is one of the actors to have appeared in both the Star Trek and Doctor Who franchises. He and Guy Siner both appeared in the 1975 Doctor Who serial . He portrayed Mister Crump the Undertaker in 1999 television film adaptation of  which starred Patrick Stewart as Ebenezer Scrooge. 

Franklyn-Robbins died on 21 March 2009 at the age of 84.

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Performers
TNG performers