In Neil Gaiman's 'Good Omens,' good and evil have a lot in common

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Michael Sheen and David Tennant in "Good Omens." Credit: Chris Raphael/Amazon Studios.

An angel and a demon working together to save the world -- that's the plot of Neil Gaiman and Terry Pratchett’s 1990 fantasy novel "Good Omens." Now it's been turned into a six-part Amazon Prime series starring Michael Sheen as the angel and David Tennant as the devil.