One of numerous spin-off romantic mysteries starring Robert Wagner and Stefanie Powers as the glamorous socialite sleuths, roles they created in the TV series of a decade earlier. This is one of the better ones, briskly directed by Kevin Connor, and involves Jonathan Hart discovering that he may have a sister he never knew. But is he being misled by ingenious crooks? Veteran actor Lionel Stander makes his last appearance in the series: the movie is dedicated to him.
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