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The eponymous partners in this British melodrama are played by Anthony Dawson and Basil Henson. Zena Walker, the unhappy wife of Dawson, talks Henson into murdering her spouse and taking over the business. His next step is to kill his own wife, thus smoothing the path of his romance with Walker. Detective Kenneth Cope smells a rat, despite Walker's carefully laid scheme. Change Partners is a rare non-Edgar Wallace production from Merton Park Studios.