DC Universe Online: Episode 4 - The Last Laugh (2012)

The fourth episode, The Last Laugh, was released on June 19, 2012. This episode focused on the Joker as he gained access to hero and villain safe houses to stir up additional controversy between the player factions. Some of the key features of this episode include one Tier 3 hero Duo in Shady Nightclub, and one Tier 3 villain Duo in Police Station. This marked the final performance of Arleen Sorkin before her retirement. This was also her final time voicing her iconic character Harley Quinn.