A dead and unknown woman is found in a canal. Police inspector Martin Beck becomes involved in the case. After several months the woman is identified. The police reconstruct the woman's last trip on the canal boat "Wilhelm Tham".
Martin Beck
Folke Bengtsson
Gunnar Ahlberg
Roseanna McGraw
Sonja Hansson
Mary Jane
Siv Lundberg
Kollberg, kriminalare
Elmer B. Kafka
Stenström
Projectionist
Martin Beck's Wife
Waitress
Mrs. Bellamy
Günes Fratt
American Passenger
Cleaner
Ship Hostess
Night Porter
Drunk
Doctor
Journalist
Journalist
