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Darker Side of Terror is a TV movie that wants to have its cake and eat it too: it is a science fiction drama and a romantic triangle all in one. Researcher Robert Forster submits to an experiment in cloning conducted by his former professor (Ray Milland) The operation is a success--except in terms of Forster's personal life. It seems that the researcher's wife (Adrienne Barbeau) finds the clone to be more desirable than the original. To make matters dicier, the clone is a homicidal maniac! Darker Side of Terror is derivative from start to finish; the producers should have simply put their cards on the table and titled the film The Adventure of Frankenstein's Sexier Brother.