10 Actors Who Appeared In Star Trek AND Batman: The Animated Series

5. David Warner - Ra's Al Ghul

David Warner, though having appeared as several characters in Star Trek on-screen, is perhaps best known for his distinctive timbre. Though physically slight, he could raise the hairs on the back of your neck from three rooms away, generally with few words.

He appeared as Ra's Al Ghul in Batman: The Animated Series, reprising the role in both Superman: The Animated Series and Batman Beyond. As the 'Demon's Head,' he is one of the few rogues fully aware of Batman's secret identity, adding an extra layer to their relationship. He appeared in four episodes of The Animated Series.

In Star Trek, he first appeared in Star Trek V, though he returned as Chancellor Gorkon in the subsequent film. He may be best remembered for his 1984-inspired Gul Madred, acting in a last-minute tour-de-force opposite fellow Royal Shakespeare Company alum Patrick Stewart.