Guest Stars Áine Rose Daly as Sandy Phillips Cherrelle Skeete as Terri Miller Joel Kinnaman as Erik Heller Yasmin Monet Prince as Clara Mahan - Girl 249 Gianna Kiehl as Jules Allen Sèverine Howell-Meri as Helen Young Anthony Welsh as Leo Garner Clea Martin as Jessie - Girl 233 Katie Clarkson-Hill as Joanne McCoy Joanna Kulig as Johanna Petrescu Ellen Evans as Laura - Girl 261 Mia Jenkins as Danielle Marks Ria Lopez as Nina - Girl 256 Pia Hagen as Charlie - Girl 228 David Avery as Stephen Mannion Henry Davis as Guard 1 Adele Oni as Guard 4 Paddy Rowan as Young Guard