Paris replaces Nicolai while Sebastian takes Paris' place while Barney sneaks into the royal vault to replace the royal jewels but is blinded by a concussion. Barney manages to make his way to the vault despite his blindness and replace the real jewels with fakes. Paris-as-Nicolai slips Francesca a gun and she fake-shoots herself at the altar. Sabattini orders her entombed where Barney is on hand (barely) to rescue her and get back to the magic act where they get out of the castle, leaving Paris-as-Nicolai in place and Barney still within the walls. Meanwhile, Jim, pretending to be a fence, alerts Sabattini to the fact the jewels are replaced with fakes, and only Stephan knows where they are.moreless
General Sabattini has faked the death of Prince Stephan and plans to force Stephan's fiancee, Francesca, to marry him and let him ascend the throne over the simpleton Prince Nicolai. Once he has married Francesca, Sabattini plans to kill all three - the IMF must thwart him. Paris, Tracey, and Willy infiltrate the palace as a magic act, sneaking in with a hidden guest-agent Sebastian and Barney.moreless
The Jupiter 2 lands on a planet which apparently serves space as a junkyard. The Robinson's food supply is dwindling, so Dr. Smith tries to sell the robot and the ship in order to get food.moreless
Two cousins steal $500 million worth of jewels from a diamond syndicate and both U.N.C.L.E. and THRUSH want to find out how they pulled it off.