Freddie Silva (Doctor Coco)Sanath Gunathilake (Chaminda Randeniya)Shashi Wijendra (Nalin)Sabeetha Perera (Surangi)Nihal Silva (Doctor Ko)Bandu Samarasinghe (Marmite)Sumana Amarasinghe (Nayana Randeniyagala)Joe Abeywickrama (Professor)Nadika Gunasekera (Madhu Nangi)Lionel Daraniyagala (Chance)Eddy Amarasinghe (Orderly)M.V. Balan (Security guard)Sunil BamunuarachchiMabel Blythe (Mrs. Saparamadu)Manel Chandralatha (Coco's darling)Tennyson Cooray (Room guard)Vajira DilrukshiLilian Edirisinghe (Head nurse)
Roy de Silva
Doctor Coco and Ko are in charge of a mental hospital. Chaminda is a sane man who enters himself into this hospital to avoid being killed by his relatives, who are demanding that he write over his property to them. The doctors and the nurses in the hospital help him and they face many funny situations.