Arrowverse, meet Pariah. In a new behind-the-scenes photo from "Crisis on Infinite Earths," the upcoming five-show crossover, The Flash star Tom Cavanagh dons a green and gold outfit to become his latest character, Pariah.

Cavanagh's Pariah stands among several longtime Arrowverse heroes, including Superman, Elongated Man, Black Lightning, Flash, Spartan and Iris West-Allen, as well as newcomers the Monitor, Harbinger, Ryan "Atom" Choi and Kingdom Come Superman. The group is gathered on the bridge of the Waverider, the time-traveling ship from DC's Legends of Tomorrow.

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"As part of 'Crisis on Infinite Earths' crossover, not only will Tom [Cavanagh] be playing the two character we heard here, he will also be playing Pariah as part of the crossover," The Flash showrunner Eric Wallace revealed at the show's Comic-Con International panel. "He works for the Anti-Monitor."

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"In the original miniseries, it's Pariah who is very much integral in releasing the Anti-Monitor," he continued. "For Tom to play such a pivotal character... it's just going to tear your guts out and make you cry."

In Marv Wolfman and George Pérez's Crisis on Infinite Earths, Pariah inadvertently summoned the Anti-Monitor and thereby launched the events of the comic. Pariah was one of the greatest scientists on his world but, as a result of his experiment to view the creation of the universe, he caught the Anti-Monitor's attention. The Anti-Monitor used Pariah's experiment as a tool to free himself from a prison made by his brother, the Monitor. The Monitor snatched Pariah away from his world just before the Anti-Monitor destroyed it. The destruction of Pariah's world gave the Anti-Monitor enough power to begin his quest to annihilate the multiverse.

"Crisis on Infinite Earths" begins Sunday, Dec. 8 at 8 p.m. ET/PT on Supergirl, then continues in Batwoman on Monday, Dec. 9 at 8 p.m. ET/PT and in The Flash on Tuesday, Dec. 10 at 8 p.m. ET/PT. After the winter hiatus, the crossover will conclude on Tuesday, Jan. 14 in Arrow at 8 p.m. ET/PT and in DC's Legends of Tomorrow at 9 p.m. ET/PT.

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