The original PK (2014) is a single film directed by Rajkumar Hirani. There is no official sequel, nor any 42-part series. The number "42" in your search likely refers to:
While searching for his "remote," people tell him that only "God" can help him. This leads the alien to explore various religions, questioning their contradictory rules and the "wrong numbers" (misinterpretations) spread by self-proclaimed godmen. Key Characters: He befriends Pk Movie Tamil Dubbed 42
Title: PK (Tamil Dubbed) — Why This Unlikely Satire Still Matters The original PK (2014) is a single film