We salute some of the finest guest stars of Star Trek: The Next Generation…

This article originally appeared onDen of Geek UK.

This list celebrates some of those performances.

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9.

For today, however, we want to highlight James Doohans poignant turn as Scotty in season sixs Relics.

And wed all kind of guessed about his methods for gaining a reputation as a miracle worker.

However, it is not just the big, emotional, showy guest roles that lift an episode.

Without a strong guest performance, the tense climax of the episode could never have worked.

However, it is reasonably memorable for classic Hollywood actress Jean Simmons performance as Admiral Norah Satie.

The trick to Del Arcos performance is the wide-eyed, childlike innocence with which he plays Hugh.

A perfect first substantial callback to the original series.