Celebrity Watchlist: Which TV Show Gives Outlander's Sam Heughan Nightmares?

Sam Heughan says he was influenced by Outlander showrunner Ron Moore long before the two began working together.

"I grew up with [Star Trek: The] Next Generation," Heughan tells TVGuide.com in his Celebrity Watchlist video below. "The first time I had dinner with Ron we were talking about world order and how we should all work together ... and I realized I got that point of view from watching Next Gen."

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Check out his video to find out what show he watched during pilot season and which series gives him nightmares!