Lee Sung-jin Creator, Executive Producer Oscar Isaac Josh Actor Carey Mulligan Lindsay Actor Charles Melton Austin Actor Cailee Spaeny Ashley Actor Youn Yuh-jung Chairwoman Park Actor Song Kang-ho Dr. Kim Actor Jang So-yeon Eunice Actor William Fichtner Troy Actor Mikaela Hoover Ava Actor Matthew Kim Woosh Actor Ali Wong Executive Producer Steven Yeun Executive Producer Jake Schreier Executive Producer Ravi Nandan Executive Producer Alli Reich Executive Producer