Time: Tuesday 8/7c
Air Date: March 31, 2015
“Trickster”—A copycat killer known as the Trickster sets off bombs in Central City. In an effort to stop him, Barry and Joe seek help from the original Trickster (Mark Hamill), a criminal mastermind who has been imprisoned for 20 years. Meanwhile, Iris asks Eddie to help with a case. In flashbacks, Harrison Wells is shown coming up with the idea for the particle accelerator.