‘The Flash’ Season 4 Spoilers: ‘Westworld’ Actor Leonardo Nam To Guest Star

Leonardo Nam has booked a guest spot on CW’s “The Flash.”

According to Deadline, the “Westworld” actor will appear as Matthew, aka Melting Pot, in Season 4, episode 16 of the Grant Gustin-led series. Matthew has the powers to swap people’s DNA, and during a battle with Team Flash, he transfers Barry’s (Gustin) super speed to Iris (Candice Patton). In the wake of the reversal, Barry must act as the team leader while Iris takes on the mantle of superhero speedster in order to defeat their new foe.

Aptly titled as “Run, Iris, Run,” the episode is scheduled to air on March 13. Take a look at Iris’ costume as a speedster below:

In addition to his role as lab technician Felix Lutz on HBO’s “Westworld,” Nam’s other TV credits include Netflix’s “Disjointed,” CBS’ “Hawaii Five-0,” USA Network’s “Royal Pains,” and Fox’s “Bones.” On the film side, Nam appeared in “The Fast and the Furious: Tokyo Drift,” Katherine Heigl starrer “One for the Money,” and Harrison Ford-led crime drama “Crossing Over.”

Also guest starring in the episode is “Glee” alum Max Adler. As reported by FlashTVNews last month, Adler will play the role of Jaco Birch, “an obsessive music fanatic who worships at the altar of classic heavy metal.” He’s also a roadie for unknown contemporary metal bands and loves to set things on fire.

News that Patton would be suiting up on “The Flash” was first revealed when the actress was spotted wearing her speedster costume while filming scenes for the show with Adler at Harbour Green Park in downtown Vancouver in Canada in January.

While The CW has yet to release a clip of speedster Iris in action, frequent “The Flash” director Kevin Smith recently tweeted that Patton “crushed” the role.

Although Iris’ super speed is only temporary, Patton seemingly doesn’t mind at all. During the “Heroes and Aliens” panel at PaleyFest last March, Patton said (via Entertainment Tonight) that she wasn’t really bummed that Iris doesn’t have any powers. “While I would love to strap some leather on for an episode, I love that [Iris] provides this human quality on a very superhuman show,” the actress said. “I think she’s extraordinarily important to Barry’s superhero narrative.”

“The Flash” Season 4 returns with new episodes starting on Tuesday, Feb. 27 at 8 p.m. EST on The CW.