S1 • E23 Mar 1, 1967
It would appear that the Mona Lisa has been stolen from the Louvre. But is it the actual Da Vinci painting or a forgery substituted to thwart the thieves? One of the robbers flies into London secretly and arranges to meet with Mannering so that he can authenticate the spoils whilst a French spy bugs the Baron's phone so that he too can find out further details. Ultimately Mannering finds himself the prospective saviour of one of the world's most iconic paintings.
