

A reclusive mathematician returns to England to attend his brother's funeral, finding a world much changed from the one he left, and is pulled into a spiral of strange events.
A reclusive mathematician returns to England to attend his brother's funeral, finding a world much changed from the one he left, and is pulled into a spiral of strange events.
A terrified Yasim confronts Stephen, fearing that Michael was murdered because he was trying to prove a link between a Hepatitis B vaccine used in the refugee camps and the disease that killed Nadir. Meanwhile, Nye is out on the Afghan-Pakistan border investigating the site of Michael's death, and Russell drops a bombshell.