Sunny and Bajie face off against a deadly new foe with a dark connection to Sunny's past; Chau enlists her brother in the fight against Pilgrim.

Cast: David Alexander, Sherman Augustus, Emily Beecham, Orla Brady, Babou Ceesay, Dean-Charles Chapman, Nick Frost, Ally Ioannides, Maddison Jaizani, Aramis Knight, Eleanor Matsuura, George Sear, Ella-Rae Smith, Lewis Tan, Lorraine Toussaint