Top 5 best Science Fictional bollywood movies

1] Robot 

This is an awesome movie which revolves around Dr Vasi who invents a robot, Chitti. The robot puts Vasi's life at risk when it falls in love with his fiancee and is manipulated into destroying the world when it lands in the hands of a rival scientist.

2] Action Replayy

It is an Indian science fiction romantic comedy film based on a son tries to revive his parents' lifeless marriage by travelling back in time to the 70s when their romance was budding. But to his surprise, this turns out to be more complex than he expected.

3] Krrish

Krrish is a  story of a young man with superpowers, falls for Priya. He goes to Singapore to meet her. Circumstances force him to become a superhero and rescue his father Rohit Mehra, who is supposedly dead.

4] Koi... Mil Gaya

The story is about a scientist's mentally challenged son who accidentally summons a spaceship and befriends the alien inside, granting him powers to live a more normal life.

5] Mr. India

The story is about a  poor but big-hearted man takes orphans into his home. After discovering his scientist father's invisibility device, he rises to the occasion and fights to save his children and all of India from the clutches of a megalomaniac.