The Flash season 1, episode 17, “Tricksters,” airs tonight, as Mark Hamill reprises his role as the Trickster.

Previously

Barry traveled through time and reversed a number of major events, such as Iris learning Barry’s secret and confessing her feelings for him, and Harrison Wells revealing his identity as Eobard Thawne.

In the new timeline, Captain Cold returned, bringing his sister along. He kidnapped Cisco and his brother, Dante, to to force Cisco to remake their weapons. Cisco was forced to reveal Barry’s identity to Captain Cold, and Barry and Cold eventually came to an agreement where Barry would leave Cold to his devices as long as he didn’t kill or target Barry’s loved ones.

Read our recap for The Flash season 1, episode 16, “Rogue Time,” here.

Related: The Flash’s Tom Cavanagh teases Harrison Wells’ endgame

Watch a promo

Producer’s preview

‘The Flash’ season 1, episode 17, ‘Tricksters,’ synopsis

If that promo has whet your appetite, make sure to read the official synopsis for the 17th episode of the season:

“MARK HAMILL (“STAR WARS”) REPRISES HIS ROLE AS THE TRICKSTER — A copycat killer who goes by the name “The Trickster” (guest star Devon Graye) starts setting off bombs in Central City. In order to stop the villain, Barry (Grant Gustin) and Joe (Jesse L. Martin) meet with the original Trickster, a criminal mastermind named James Jesse (guest star Mark Hamill), who has been imprisoned for 20 years. Things quickly go from bad to worse when the Tricksters unite and take Henry (John Wesley Shipp) prisoner.

“Meanwhile, Iris (Candice Patton) asks Eddie (Rick Cosnett) for help with a case, and flashbacks show how Harrison Wells (Tom Cavanagh) came up with the idea for the particle accelerator. Ralph Hemecker directed the episode written by Andrew Kreisberg (#117).”

Related: The Flash’s Mark Hamill talks the Trickster and his ‘worthy successor’

If you need more goodies to tide you over, we have promotional stills from the episode as well:

Will you watch ‘The Flash’ season 1, episode 17, ‘Tricksters’?