After the death of his Russian mother, nine-year-old orphan Peter lives with Professor Hartmann and his daughter Helga, who cares for him like a mother. Peter is very musical. He especially loves the melancholy songs of the Don Cossack Choir, which remind him of his mother. Because the boy has suffered from a severe heart defect since birth, his doctor, Dr. Stark, has forbidden him any excitement, including music. When one day the Don Cossack Choir's tour bus breaks down near Peter's house with engine trouble, the little boy meets the conductor Serge Jaroff and his famous singers in person.

Murder mystery about the disappearance of a boy who has leukaemia following the murder of his mother, which he witnessed.

TV movie by Udo Langhoff

The young veterinarian Dr. Vlimmen settles in a small town on the North Sea coast. When he reports the conditions in the local slaughterhouse as cruelty to animals, he makes an enemy of the influential butcher van Heusden, who launches a smear campaign against him. Vlimmen is only supported by his sister Truus and his friend, lawyer Dacka, who loves Truus. In the end, Vlimmen succeeds in clearing his name. Through a daring operation, he regains his reputation and also finds Nel, the daughter of councillor van der Kalk.

Ursula Gothe is the mother of a son, husband Richard is to be promoted soon. Her orderly life in the pretty villa gets out of joint when Ursula discovers a girl's newspaper ad. Is "Suchkind 312" her illegitimate daughter Martina, whom she had lost while fleeing from the East?