Crossroads is a 1942 mystery film noir directed by Jack Conway and starring William Powell, Hedy Lamarr, Claire Trevor and Basil Rathbone. Powell plays a diplomat whose amnesia about his past comes back to trouble him.
During a trial of the extortionist, whose defense is that he was seeking a repayment of debt by a former criminal comrade, Talbot is accused of being that notorious criminal. Henri Sarrou Basil Rathbone testifies that he is not. Talbot claims that amnesia prevents him from knowing the truth and his story is backed up by a psychologist, Dr. Tessier Felix Bressart. Le Duc is convicted.Sarrou then visits Talbot at his home where we learn that Sarrou deliberately testified falsely to set up his blackmail scheme. He demands a million francs, half the loot from an alleged scheme he and Talbot in his forgotten criminal phase carried out. ........
Source: Wikipedia