RJ Cyler as Jones Tim Russ as Dr. Chowodury, a doctor at the Marais hospital Micah Fitzgerald as Munson / the Rot Adrienne Barbeau as Dr. Palomar, the assistant director of the CDC. Barbeau previously appeared in the 1982 film adaptation of Swamp Thing as Alice Cable, an amalgamation of Abby Arcane and Matt Cable. Jake Busey as Shaw