One Plus One Equals ThreeOne Plus One Equals Three is a 1927 German silent film directed by Felix Basch and starring Veit Harlan, Georg Alexander, and Claire Rommer.The film's art direction was by Heinrich Richter.CastVeit Harlan as PaulGeorg Alexander as PeterClaire Rommer as AnniGyula Szőreghy as Annis VaterMargarete Kupfer as Annis MutterSig Arno as Doktor PlanerKarl Platen as DienerLissy Arna