Chehre Pe Chehra (1981)
Wilson is a scientist who feels that every human has both angelic and devilish elements in themselves. He strongly believes that these two elements can be segregated and then a medicine can be invented to eliminate the undesirable element, while leaving only the desirable element intact. Wilson eventually invents a potion to put his theory into effect. He decides to test the invention on himself. But the result does not occur as he had theorised: although his devilish persona gets segregated from his angelic persona, it is much more powerful, and Wilson is unable to eliminate it.
