sentences:  Over the radio, Nick learns that Olga has committed suicide, but the spy was trying to get top-secret information to her superior, who is still among the passengers.Another of the passengers, Doctor Van der Linden (Stephen Geray), goes missing, but returns with food he claims comes from a nearby monastery.The doctor leads everyone on a long hike to the monastery, only to reveal there that he is a Nazi collaborator working with the Japanese.