Three chemists unveil “Substance L,” a pesticide capable of eradicating all life without harming material assets. When Dr. Zichy, haunted by his work on Zyklon B, dies in a car crash and the lethal vial vanishes, colleague Dr. Cramm uncovers a child’s poisoning. To suppress the scandal, the corporation and justice system commit him to an asylum, until his assistant Barbara risks everything to expose the truth.
| Actor | Role |
|---|---|
 Günther SimonDr. Cramm | Dr. Cramm |
 Christine LaszarDr. Barbara Frei | Dr. Barbara Frei |
 Franz KutscheraDr. Mommer | Dr. Mommer |
 Liselott BaumgartenBallonverkäuferin | Ballonverkäuferin |
| KKurt SteingrafNot listed | Not listed |
 Friedrich RichterNot listed | Not listed |
 Erika PelikowskyNot listed | Not listed |
 Peter KiwittNot listed | Not listed |
 Helmut SchreiberNot listed | Not listed |
 Martin FlörchingerNot listed | Not listed |
| AAdolf Peter HoffmannNot listed | Not listed |
| HHannes FischerNot listed | Not listed |
| SSiegfried WeißNot listed | Not listed |
 Werner LierckNot listed | Not listed |
| GGerhard FreiNot listed | Not listed |
 Peter SturmNot listed | Not listed |