In desperation, Loddon's barrister, Sir Wilfred (Robert Morley), puts Lady Margaret Loddon on the stand, but she testifies that she now believes her husband is Wellney, the impostor, implying that "Number Fifteen" is the real Sir Mark Loddon. Later, Lady Margaret confronts her husband, who in desperation walks the night trying to remember more. Finally, seeing his reflection in a canal unlocks his memories. Wellney did try to kill him while his back was turned, but he (Loddon) saw Wellney's reflection in the water and won their struggle. His memory returns of beating Wellney extensively with a farm tool before switching their clothes and fleeing. In court, Loddon remembers a keepsake hidden in his Battle Dress lining: a medallion his then fiancée gave him in 1939 before leaving for France. By finding it in Wellney's possession all the time, Loddon wins the libel case and his wife back. Buckenham and Loddon also reconcile although Buckenham and the newspaper must pay damages.