This first season of The CW's The Flash has certainly been mind-bending, playing with the very mechanics of speed and time, but perhaps one of the most anticipated moments of the series is still ahead of us: the arrival of Mark Hamill's Trickster.

Hamill originally played the character in the 1990s version of the series, starring John Wesley Shipp as The Flash, who now plays Barry Allen's father on The CW version of the show.

What's even better about this upcoming episode is that we'll see a bit of a tease from that 1990s series: some old photos of Mark Hamill in his wild and colorful Trickster costume. Or as Cisco on the series says, " "Someone was rocking the unitard."

In DC Comics, Trickster first appeared in Flash #113 and was a con man and practical joker (similar to Batman's Joker, a character Hamill has also voiced for video games and animated features) who liked walking on the crazy side of crime.

He was once a circus acrobat, which explains the crazy costume, and a mad genius, having created colorful gadgets, such as shoes that let him walk on air.

You can take a look at a promo for the episode, appropriately titled "Tricksters" in a new promo below:

Eventually, the comic book version of Trickster became a force for good, although he had a copycat who took on the identity of Trickster after stealing his original gadgets. That Trickster joined the Rogues, including Captain Cold (who we've seen on the new series several times).

As to what Trickster's origin is on The Flash remains a mystery, but it looks like we'll find out more next week when "Tricksters" airs. Note the plural form of the name, by the way. It's likely we'll see the second Trickster come into play somewhere in that episode.

Meanwhile, Hamill has been busy promoting Free Comic Book Day, calling himself a "lifelong comic book fan." Of course, he couldn't help but mention his upcoming appearance on The Flash, too.

Free Comic Book Day occurs on May 2nd with over 2,000 participating comic book shops across the U.S. ordering over 5 million comics. To find a participating shop near you, visit the official Free Comic Book Day website.

The Flash airs on The CW on Tuesdays.

[Photo Credit: The CW]

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