Osric Chau is getting ready for the "Crisis on Infinite Earths" crossover like a true comic fan.
The new Atom star shared his study materials on Twitter, including the entire Crisis on Infinite Earths deluxe edition and some Atom issues.
Chau will play Ryan Choi, a physics professor who soon learns that he has a pivotal role to play in the crisis. However, he's not the only guest-star lined up for the massive event. Smallville's Tom Welling will appear as Clark Kent/Superman, while his co-star Erica Durance will reprise her role as Lois Lane. The crossover will also feature an older Bruce Wayne (Kevin Conroy), Birds of Prey's Huntress (Ashley Scott) and Legend's of Tomorrow's Jonah Hex (Johnathon Schaech), among others.
"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.