PK starts off showing a UFO landing in a desert in Rajasthan and an alien (Aamir) emerging from it wearing a colourful locket. Aamir gets lured by a local Rajasthani, listening to music from his radio set, who manages to flee with Aamir's locket leaving behind the radio set. As Aamir tries to trace the thief, he bumps into Sanjay Dutt (another localite), who mistakes his lack of communication skills for a memory loss. Apparently, the aliens can learn communication skills from the other person by touching and holding their hands for some time. When Aamir tries to hold Sanjay's hands, he mistakes it for a sexual advance and takes him to a brothel where he comes in contact with a Bhojpuri speaking female, from whom he picks up the Bhojpuri dialect. Indeed surprising that Aamir picks up core Bhojpuri dialect rather than Marwari from a place in Rajasthan!!!!
Aamir heads to Delhi in search of the thief and lands up at a temple, where he is caught stealing money from donation box of a temple. He is saved by Jagat Janani (Anushka), a journalist working with a news channel, whose father is a staunch supporter of godmen and who has returned from a failed love affair with a Pakistani in Belgium.
Thereon, the film veers off in a different direction. It questions faith in God over practicality, blind faith in godmen and in what they say, blind faith in astrology. While it attempts to remain neutral to different religions, bulk of the screen time goes to Hinduism with only small mentions of other religions. Having witnessed Oh My God, the theme has lost its novelty factor and hence, fails to wow audiences as much as a 3 Idiots did.
While the intentions of the director and the actor may not have been otherwise, the movie perhaps goes the wrong route by stereotyping those following religious practices as doing so out of fear and in its core depiction of Hindu religious practices.
In terms of acting, Aamir does a great job as an alien. His facial expressions and dialogues are funny. Perhaps Bhojpuri language is a misfit. Anushka looks weird in a wig and in her outfits.
Individually, KMG and OMG would have been better choices, Watch it for Aamir and his facial expressions. Accept the message that the movie delivers on godmen while inadvertently rejecting its subtle religious biases. Three stars to this movie.