Season 20, episode 115. Gunter and Dörte joyful agree to enter into marriage. They enjoy their engagement time with a romantic dinner and breakfast in bed. Birgit excessively draws the attention to poor work of the laboratory. Nici expresses toward her that it might be that there is another cause for the double failure of the test samples. Birgit takes that as an attack on her and walks away faking to be insulted. Amelie urges her to find a solution in favor of the girl's life; due to her deliberate sample swap Mathias appears to be a hard to find bone marrow donor. Birgit succeeds in convincing Britta of a general quest for the unknown suitable donor and so hopes to avoid being suspected of the illicit swap. Mathias tells Nici that he trusts his wife. Sandra also finds Nici's suspect unlikely and Nici doubts her theory that much that she offers Birgit her excuses. The motor bike of Ben's customer suddenly disappeared during a short time of not paying attention to his unlocked workshop. The police makes report but can't find any traces of burglary. Ben fears that the insurance company now will refuse to pay an indemnification but he on his turn refuses to ask Hendrik or Britta for money. He rather lends money against adverse conditions. Anette waits on the police station for Sandra to talk about the upcoming visit to Malte who is in custody. To avoid that visit she receives instead an applicant to take over Malte's place in her company.
—B. Dijkhoff