: The Forty-Year-Old) is a Polish television comedy series originally broadcast in Poland between 1975 and 1978.

The initial series enjoyed so much popularity that it was continued and led to the release of a feature film I'm a Butterfly, a 40-year-old's Love Affair and a New Year's Eve television program in 1975.

The series was written by Jerzy Gruza and Krzysztof Teodor Toeplitz and was broadcast on Telewizja Polska.

[1] The series followed the fate of a Warsaw family and explored topics related to midlife crisis, such as extra-marital affairs, attempts to quit smoking, obsession with hair loss, efforts to maintain physical fitness, pride in achievements and professional life, the desire to seek self-fulfillment through social activities, etc.

20 years later the series was remade in the mid-1990s with a cast that included Joanna Kurowska, Wojciech Mann and Wojciech Malajkat.