Steeped in Arthurian legend and the poetry of Tennyson, Gillian's insurmountable obsession drives her team away. Will her brilliant mind and life's research be enough to protect her from Henry Timberdyne and find Tennyson's Gleam?

A British First World War tank containing the burnt remains of six bodies is uncovered in France. Evidence of a war crime soon emerges and Gillian inadvertently ignites an international feud with French and German archaeologists. But when violent events occur at the dig site, it becomes clear someone is trying to cover up the truth.

The looting of Babylonian relics from the Iraq war starts a trail to the team's doorstep and intertwines with the destiny of the Middle East. When an Iraqi archaeologist from Gillian's past enlists the team's help, they discover a sacred tablet predicting the future of Iraq, as well as an opportunistic war-zone looter and a dodgy antiquities dealer whose lives are in danger.

The high-risk exploration of secret Celtic chambers beneath the Roman Baths unlocks an ancient love story. Gillian and Ben unravel the tragic tale of Celtic warrior queen Boudicca and Roman soldier Quintanus, while confronting their own past relationship amid the dark and claustrophic chambers.

The discovery of 18th century bones in the Bristol Channel brings to light an extraordinary conspiracy - anyone who has investigated the final journey of the Somerset ship in the last 200 years has died in suspicious circumstances. When presidential candidate Senator Joy and a Ghanaian academic arrive in Bath, the archaeologists question their motives.

When analysis of a small piece of cedar wood from a dig indicates that it is 2,000 years old and originates from the Holy Land, Dr Gillian Magwilde and her team race to uncover the truth. While Magwilde surveys the site, however, a religious extremist acquires the land and declares it Holy Ground. Believing Britain is at war for its Christian soul, the fanatical Christian reawakens a force of violent modern-day crusaders.