Casting was good. And the work of Amir again proved the work of legendry. This movie has different kind of story in which a guy who comes from a different planet accidently left on eart alone while his and his collegues visits to earth.
Guy does not know the behaviour of human living on earth. He tries his best to understand them and play some funny roles around them. He has extra power what people on earth do not have. I love role of Anushka sharma too. It shows not to blindly believe on anything.