Wolfgang Heinz as Professor Hans Mamlock

Ursula Burg as Ellen Mamlock

Hilmar Thate as Rolf Mamlock

Lissy Tempelhof as Dr. Inge Ruoff

Doris Abeßer as Ruth Mamlock

Ulrich Thein as Ernst

Harald Halgardt as Dr. Hellpach

Herwart Grosse as Dr. Carlsen

Peter Sturm as Dr. Hirsch

Franz Kutschera as Dr. Werner Seidel

Kurt Jung-Alsen as Bankier Schneider

Günter Naumann as Kurt Walter

Agnes Kraus as Schwester Hedwig

Günter Grabbert as Simon

Manfred Krug as SA-Sturmbannführer

Bruno Carstens as

Johannes Curth as

Hans Flössel as

Walter E. Fuß as

Horst Giesen as

Gisela Graupner as

Karl-Helge Hofstadt as

Heide Kipp as

Johannes Maus as

Hans Teuscher as

Ellen Weber as