Heino was a popular German singer, so perhaps you're thinking of one of his TV specials or musical appearances from that year?
To help me provide you with the right information, could you tell me:
* What kind of production are you looking for? Was it a movie, TV special, concert recording, or something else?
* What is the full title of the production?
* What is the year of the production? (You mentioned 1977, but it's possible you're mistaken)
With more information, I can help you find the cast details you're looking for.