The film is based on the events surrounding the Lengede mining accident in 1963.
Heino Ferch
as Franz Wolbert
Heike Makatsch
as Renate Reger
Jan Josef Liefers
as Bruno Reger
Nadja Uhl
as Helga Wolbert
Armin Rohde
as Jürgen Grabowski
Sylvester Groth
as Harald Hansen
Günther Maria Halmer
as Dr. Heiner Dietz
Thomas Heinze
as Rudolf Schönfeld
Axel Prahl
as Erwin
Benjamin Sadler
as Salvatore di Pietro
Gustav Peter Wöhler
as Dr. Schleip
Klaus J. Behrendt
as Pit Spieker
