One of the biggest fan favourite villains on The Flash is the Trickster, as played by DC legend Mark Hamill. Though he’s most known for voicing the Joker since the 1990s, Hamill has also played the Trickster on both the 1990 TV series starring John Wesley Shipp and The CW’s modern interpretation.

While he appeared in guest spots throughout the show’s first three seasons, Hamill has been a no-show in season 4 so far. You might have thought that this was to do with the actor being too busy with Star Wars: The Last Jedi, but it turns out he’s just waiting for the call to be asked back. Here’s what he told ComicBook.com while in attendance at the AARP Movies for Grownups Awards:

“Who knows? They haven’t asked yet. They asked me once, and I agreed, but John was doing a play – John Wesley Shipp. But I said to them, I said, ‘You’ve got to get Corinne [Bohrer] back!’ And Devon is fantastic, Devon Graye. So I was delighted.”

Hamill is referring to season 4’s “The Elongated Knight Rises,” which saw his 1990 Flash co-star Corinne Bohrer reprise her role as Prank. In the classic series, Prank was a kind of pre-cursor to Harley Quinn as the Trickster’s female sidekick but her 2018 appearance revealed that she was the mother of the second Trickster, Axel Walker (Devon Graye). It’s interesting to know that the actress’ reappearance in the world of The Flash is thanks to Hamill.

Though he hasn’t appeared in live-action as the character since 2016, the actor did reprise the part of the Trickster in the animated Justice League Action series last year. In a hilarious skit, he got to play both the Joker and the Trickster as they teamed up to kidnap… Mark Hamill!

While we’re still waiting for Hamill to return to The CW’s hit show, then, we do know that his old nemesis John Wesley Shipp will make a comeback as Jay Garrick, the Flash of Earth-3, in the upcoming episode “Enter Flashtime.” You can catch that one when The Flash airs on March 6th.