In the US, during prohibition, the Untouchables were the group of federal agents that went after and arrested Al Capone. In India, untouchables are the lowest caste in the Hindi faith.
The main cast of the movie was: Kevin Costner - Elliot Ness Sean Connery - Jimmy Malone Charles Martin Smith - Oscar Wallace Andy Garcia - George Stone/Geuseppi Petri Robert De Niro - Al Capone