chunk: Elise is revealed to be an undercover Scotland Yard agent who was under suspension for her suspected sympathies with Pearce. She agrees to participate in a sting operation. At the ball, as Elise tries to spot Pearce in the crowd, an envelope is placed on the table in front of her, but the man (Rufus Sewell) disappears into the crowd. She tries to follow him through the crowd, but is stopped by Frank. Frank claims to be in love with Elise and invites her to dance with him. After the police surprise Frank, Elise reads the note. She leaves suddenly in her boat to be tailed by Shaw. Both parties are followed by the police. Frank is held handcuffed.