Time Runners: The children travel back to Ancient Rome for another amazing adventure.Tyler: His Story: We find out more about the children's new friend, Tyler, and his life in 19th century England.A Jack and Three Queens: The children drop in on Shakespeare in Elizabethan England to foil another Viran plot.Mission Victory: Chip and Wilf hitch a lift on HMS Victory.The Enigma Plot: The children visit Bletchley Park at the time of World War 2 to prevent the Virans from changing history.The Thief Who Stole Nothing: Find out more about the Islamic Golden Age and the discovery of zero.