Crisis on Infinite Earths: Part Three

S6 E9: In the third chapter of the Crossover, Pariah (TOM CAVANAGH) enlists Black Lightning (guest star CRESS WILLIAMS) to help stop the Anti-Monitor (LaMONICA GARRETT) after Flash-90 (recurring guest star JOHN WESLEY SHIPP) shares what he learned from his battle in “Elseworlds.” With the help of Black Lightning, Barry, Cisco and Killer Frost come up with a plan that could save them all. Meanwhile, Iris has a heart-to-heart with Ryan Choi (guest star OSRIC CHAU), while Oliver (guest star STEPHEN AMELL) and Diggle (guest star DAVID RAMSEY) return to an old familiar stomping ground.