Anna Leong Brophy (“Back,” “Traces”) will play Tamar Kir-Bataar; “The OA” alum Patrick Gibson is playing Nikolai Lantsov; Lewis Tan (2021’s “Mortal Kombat”) will play Tolya Yul-Bataar; and Jack Wolfe (“The Witcher,” “The Magic Flute”) has been cast as Wylan Hendriks.