Dr. Jackal, a brilliant scientist, has escaped from prison and plans revenge on Professor Gianni and Shaktimaan. He partners with a man with mystical abilities to control an alien plant that drains life energy. Shaktimaan and his team stop them with a software-driven nano weed killer and blocking out the sun. In the end, they save the day and prevent an alien invasion.
Here are the key facts extracted from the text:
1. Dr. Jackal is a brilliant scientist who was in prison but escaped.
2. A soil sample from Venus containing alien DNA was retrieved by the Space Agency.
3. The alien DNA was kept in an airtight underground lab with strict security measures.
4. There was an outbreak of mutated grass or alien vines in the city.
5. Professor Gianni and Lena Rey were involved in combating the alien invasion.
6. Dr. Jackal had a plan involving the alien DNA to torment Shaktimaan.
7. There was an attempt to block out the sun to stop the alien plant.
8. Shaktimaan faced challenges from Dr. Jackal and the alien plant.
Please note that the text is fragmented, and some information might be missing or not fully clear due to the format of the provided text snippets.