as "Mrs. Todhunter." As a result of her injury, Iris faints. She comes to in a compartment with Miss Froy and several strangers. She joins Miss Froy in the dining car for tea. Soon after, they return to their compartment, where Iris falls asleep. When Iris wakes up, Miss Froy has vanished, and the other passengers deny having seen her. Todhunter pretends not to remember her to avoid drawing attention to his liaison with his mistress. Iris searches for Miss Froy with Gilbert's assistance. Brain surgeon Dr. Hartz says Iris may be suffering from "concussion-related hallucinations." Fearing that any delay would make them miss the cricket match, Charters and Caldicott also claim not to remember Miss Froy. Todhunter's mistress admits to seeing Miss Froy, proving to everyone that she exists. At the first stop, Dr. Hartz's patient, covered in bandages from tip to toe, is brought aboard on a stretcher and accompanied by a deaf-mute nun. Madame Kummer, dressed exactly like Miss Froy, appears in her place. Now scared that she'll be revealed, Todhunter's mistress says Madame Kummer was Miss Froy. While continuing their search, Iris and Gilbert find Miss Froy's glasses. However, they are attacked by a knife-wielding magician, Signor Doppo, who was in Iris's compartment. They lose the glasses in the chase and the Doppo escapes. After noticing the nun is wearing high-heels, they suspect that Dr. Hartz's patient has been replaced by Miss Froy. Dr. Hartz tells his fellow conspirator, now revealed to be a British woman dressed as a nun, to drug Iris and Gilbert. Convinced they will soon be asleep, Hartz admits to them that he is involved in the conspiracy. The false nun does not follow Hartz's instructions out of loyalty to her fellow countrymen; Gilbert and Iris escape, free Miss Froy and replace her with Madame Kummer. When the train stops near the border, Dr. Hartz discovers the switch. He has part of the train diverted onto a branch line, where soldiers wait. Gilbert and Iris inform their fellow passengers what is happening. A uniformed soldier boards and requests that they all accompany him. They knock him out and take his pistol. Another soldier fires, wounding Charters in the hand. During the ensuing gunfight, Miss Froy tells Gilbert and Iris that she must get away as she is actually a spy. Just in case, she gives them a message (encoded in a tune)