is a German writer, director and producer and one of the presenters of the award-winning children's television show, Die Sendung mit der Maus. Also known as Die Maus ("The Mouse"), it has been on the air since 1971; Biemann joined the show in 1972. He has his own production company, Delta TV, and has won numerous awards, including the Order of Merit of the Federal Republic of Germany. Though he produces many film shorts for The Mouse, he doesn't speak in or narrate any of them. He is known by a trademark green sweatshirt, which he wears on television and in public appearances.