In spoof of "My Fair Lady," Solo is recuperating from a fall into a Venice canal, Illya teams with Mark Slate to uncover Baroness Bibi de Chasseur, a THRUSH money courier who has contact with the treasurer of THRUSH. They recruit a barroom entertainer, Rosy Shlagenheimer, an exact double, to impersonate her. The switch is made, but in the confusion the Baroness makes another switch and poses as Rosy, then finds herself falling in love with Slate. (thetvdb.com)