“Oh compassionate ones, this person is going from this world to the other shore,” Teresa Knowlton (Alice Englert) reads from The Tibetan Book Of The Dead, as we watch Sobhraj dump ...

The three-part documentary series, The Real Serpent: Investigating a Serial Killer, includes tapes of Sobhraj talking about the murders of US tourist Teresa Knowlton, 21, in Bangkok in 1975.