We see the last glimps of Joaquin Pheonix becoming an agent of chaos in the final chilling trailer for 'Joker'.
The psychological thriller will see Pheonix transition into a villain after suffering from a number of setbacks. See the trailer below.
The trailer ends with Joker being invited onto the late night show, hosted by Robert De Niro, where he wants to be introduced as 'The Joker.'
'Joker' is set to arrive in theaters on October 4.