As German defeat becomes inevitable, the Charité staff struggle to treat patients without supplies and await the Russians' arrival with mixed feelings.

Koch fails in one aspect of his life, but succeeds in another. Ehrlich faces a betrayal and increasing anti-Semitism. Ida rethinks her future plans.

Nurse Christel presses Otto for an engagement. Artur makes arrangements for Karin behind Anni's back. A coup attempt has consequences for Sauerbruch.

Despite worrying results, demand for tuberculin overwhelms the Charité. Behring's diphtheria cure is put to the test. Ida meets Tischendorf's father.

Nurse Therese falls ill. Koch tests tuberculin on humans, starting with himself. Behring reaches a breakthrough in his work on a diphtheria cure.

East Berlin in the summer of 1961: Dr. Ella Wendt is transferred from Senftenberg to the Charité to ensure health care. Doctors and nursing staff leave the GDR en masse for West Berlin.

A newborn baby with jaundice is announced in the children's ward from the women's clinic. When the ambulance finally arrives, the baby's condition is poor. He needs a direct blood donation.

In 1943, a medical student seeks to use a soldier's case for her psychiatry dissertation, while her brother tries to prevent the man's court-martial.

In a covert operation, the provisional wall is erected, dividing the city into East and West Berlin, thus making the Charité an immediate border area.

The first person killed at the Wall is floating in Humboldt Harbor. Ella is terrified that it could be Curt. Prokop performs an autopsy on the body. The investigation is carried out in absolute secrecy...