Analysis by U.N.C.L.E. shows the formula to be nonsense, so the agents conclude that it is one-quarter of the full formula. They next head to London, where they find Sandy's step-sister Imogen (Jill Ireland) arrested by a constable for indecent exposure (a bikini). Solo posts bail and they go to Imogen's nightclub, fight again with Randolph and the Karate Killers, then are saved by constables, one of whom (Terry-Thomas) catches Imogen's eye romantically. Sandy discovers a similar photo of her father in Imogen's dressing room, but with a different formula in the background.
