From an early age, Arnold believes he is an extraterrestrial. Day in, day out, he is busy trying to build a flying machine that will finally take him "home". Protected by his mother Ida and her long-time admirer, the country doctor Emil, he is regarded as a quirky but lovable outsider in his home village.

• Max Riemelt
• Katja Riemann
• Armin Rohde
• Anneke Kim Sarnau
• Dietmar Mues
• Hardi Sturm
• Charly Hübner
• Sonia Serrano