Hopkins says producers initially described his role as cross between Walt Disney and Dr. Frankenstein.

For the actors, playing androids is particularly challenging because everything a host does must have some logical purpose.

Every little beat, every moment and every flicker of your eye means something, Wood says.

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Credit: John P. Johnson/HBO

The Gunslinger is a twist on the 1973Westworldfilms murderous terminator gunslinger (Yul Brynner).

He comes across as a sadist whos on a mysterious quest.

Hes got a much more specific intention than just having a good time, Harris says.

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John P. Johnson/HBO

This is Teddy Flood (James Marsden).

Youll constantly be off balance, the actor promises.

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John P. Johnson/HBO

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John P. Johnson/HBO