Signs of Life (German: Lebenszeichen) is a 1968 feature film written, directed, and produced by Werner Herzog.

[1] During World War II, three German soldiers are assigned to guard a depot of unusable munitions in an old fort in a small coastal community on the Greek island of Kos.

The old Turkish man who appears in the film with a written translation was the last surviving worker from Rudolf Herzog's archaeological project.

[2] During several shots, Peter Brogle could only be filmed from the waist up after he had been injured in a tight-rope accident and spent several months in a walking cast.

[2] The man who appears as a pianist in one scene is keyboardist Florian Fricke of Popol Vuh, who composed and performed the music for many of Herzog's later films.