Madame Sin (1972)

Ever wonder what Fu Manchu would look like if Christopher Lee looked just like Bette Davis?

Stop wondering, here's the answer. Ms. Davis plays the evil Madam Sin, an oriental villainess who is plotting world conquest from her Scottish castle, fully equipped with laboratory, sonic weapons, hypnotic drugs, etc.

She abducts Robert Wagner, an ex-CIA man whom she frames as a defector. Then she dupes him into helping her kidnap a naval officer and steal a nuclear submarine. European audiences paid to see this pilot for an unsold TV series.