When a small team of government investigators learns that ordinary citizens all around the U.S. are losing their life savings to scam callers, they go on the hunt for the shadowy multinational mob behind the con, unraveling their plot from strip malls in suburban Texas to office towers in one of India's largest cities. In the season four of Chameleon, host Yudhijit Bhattacharjee retraces the steps of the cops and the crooks, and goes deep into the Indian underworld looking for the alleged ma ...