franz jarnach (14 october 1943 – 16 january 2017) was a german actor and musician. he was also known by his stage name mr. piggi. he was best for his role as schildkröte in the improv comedy series "dittsche". he appeared in the series at least 188 times between 2004 and 2014. he was a pianist for the 1960s british beat group lee curtis and the all-stars. he appeared on the music program "beat-club" with the group twice. he was also a member of the rock band the rattles during the early 1990s.