Dr. Siva (Tamil: டாக்டர் சிவா) is a 1975 Indian Tamil film, directed and produced by A. C. Tirulokchandar. The film stars Sivaji Ganesan, Manjula, V. K. Ramasamy and Major Sundarrajan in lead roles. The film had musical score by M. S. Viswanathan.
Set in the year 2024 in post-apocalyptic America, 18-year old Vic and his telepathic dog Blood are scavengers in the desolate wilderness ravaged by World War 4, where survivors must battle for food, shelter, and sexual companionship in the desert-like wasteland.
On Saint Valentine's Day in 1900, the female students at a private Australian school are given permission by their stern headmistress to travel to an ancient volcanic outcropping for an afternoon picnic.
During World War I, a German U-boat sinks a British ship and takes the survivors on board. After it takes a wrong turn, the submarine takes them to the unknown land of Caprona, where they find dinosaurs and neanderthals.