In his first mission since discovering the devastating truth about operation Shah Mat, Robin launches an abortive raid on Nottingham Castle's new Strong Room.

When a group of boys accidentally stumbles on Gisborne's weapons testing site, all but one is taken prisoner. When the alarm's raised, Robin hatches a plan. But with Gisborne armed to the hilt in an indestructible suit of armour, a rescue attempt is more difficult than it might first appear. Robin must think fast if he's to save a boy's life and stop a vital part of the Sheriff's war machine...

The Sheriff and his sinister scientist, Joseph (pretending to be the Nightwatchman), test a poison, blaming the ill effects on the pestilence.

A horrified Robin realises that his plan to capture the Sheriff's spy, Henry of Lewes, has failed because he has a traitor in his gang. Fearing for Marian's safety in the castle, Robin sets about rooting out the turncoat. His only clue is supplied by Marian: the spy's meeting place is located at the Trip To Jerusalem Inn, where the traitor outlaw sells his secrets to Gisborne.

The Sheriff's Black Knights gather at the castle to attend a feast and declare their allegiance to Prince John by signing the Great Pact of Nottingham. With the outlaws disguised as entertainers, Robin infiltrates the castle to join forces with the only man who can stop them: former Sheriff Edward's old ally and Black Knight, the Sheriff of Winchester. Winchester's territory is key to the Sheriff's Shah Mat plan that will apprehend a homecoming King Richard at the southern ports.

Robin is determined to get hold of the Great Pact of Nottingham, written proof of the Sheriff's treason. So when lovelorn Knight John of York and his chest of silver pass by Robin and the gang, and the Knight begs the outlaws to take pity on him and save his girl, Robin formulates a plan.

Marian wakes up in Sherwood Forest on the first day of the rest of her life as an outlaw with Robin and his gang. Surprising everyone with a new energy and recklessness, however, she jeopardises the gang's mission to bring aid to Clun Village after it's ransacked by the Sheriff's men.

A mortally wounded, one-legged messenger from King Richard flees Locksley Manor pursued by Gisborne's men and ends up in the arms of Robin. In his dying breath, he tells Robin that the King needs him to return to fight in the Holy Land, and utters the word "Lardner". The Sheriff is furious that the messenger got away, especially now that he and Gisborne are also on the hunt for Lardner, having received a prediction from a fortune-telling Fool that the "ring of Lardner" spells trouble.

Prince John's army is summoned to raze Nottingham to the ground at sunset. Gisborne risks his life standing by Marian as they fight to save the townsfolk from oblivion.

The King's guard Legrand arrives with a vital mission for Robin. Robin joins the quest to unravel the coded clues leading to the mysterious Thesaurus Patriae.

The gang are captured by the Sheriff's mercenaries. Allan a Dale realises that the Sheriff and Gisborne intend to kill the King.

The Sheriff, Gisborne and Marian are in the Holy Land. It is up to Robin to save the King's life as the battle for England is on.

Ruthless Rufus is in town, intent on revenge. When he kidnaps Allan and Kate, Robin retaliates by snatching his son. Robin and the gang face a race against time as they try to find Rufus' hiding place. Will they succeed, or is this the end of the road for Allan and Kate?

Robin and the gang have been busy constructing their ingenious new camp, but, when Knighton Hall is razed and Marian and Edward are taken to the castle under house arrest, it's clear that the rules have changed.

Robin, Earl of Locksley, returns home after five years fighting the Crusades to discover his England is not the same England he once knew. He must make a choice to compromise his values of honour and justice and adapt to the new order or make a stand to save four innocent lives.

The Sheriff turns the heat up on Robin and his gang by forcing the Abbot to accuse them of stealing from the church. Tuck's attempt to clear Robin's name ends with him being captured and tied to the rack. Will the gang free Tuck in time, while escaping execution themselves?

Gisborne returns with Prince John's Elite Guards and a secret new weapon. Little John finds himself separated from the others and ends up in a Gladiator circus. Robin finds himself helping a mysterious woman.

Prince John has all the local wells blocked when a heat wave hits the area leaving the outlaws forced to take desperate measures to save those at risk. Robin and Isabella's secret relationship is discovered by Prince John and he orders Gisborne to get rid of them. Robin finds himself having to make a difficult decision.

Little John and his band of outlaws are proving a difficult problem to overcome for Robin and his men. The Sherrif retaliates against the Robin's defection by threatening the people of Locksley. Robin is given a choice: Surrender or allow the people of Locksley to suffer.

The Sheriff's bailiff is murdered and rumours point to Robin being the culprit. However, he believes it to be a do-gooder known as the night watchman. Robin and the Sheriff form an unholy alliance to find the true identity of the murderer.

When the Sheriff of Nottingham decides to sell all the local men to Finn, the rightful King of Ireland (who seeks to liberate Ireland), a young village girl named Kate does everything she can to save her brother from conscription- which involves betraying Robin...

Roy is captured by the Sheriff and he is given a choice - kill Robin or watch his mother hang. The Outlaws find a baby in the forest and try to find the parents. Marian defies the Sheriff and he plots her punishment.

The Outlaws return from the Holy Land and Robin breaks up the gang- all he cares about is getting revenge on Gisborne. However, a traveling monk named Tuck makes him realize exactly how much the country needs him.

The Royal Keeper of the Keys and Robin's former mentor, Lord Sheridan announces that King Richard has been killed in battle. Prince John orders a hasty coronation at Nottingham and forces the Archbishop to preside over it. Can Robin unveil a hidden secret before John is crowned King?

Lambert, a friend of Sir Guy of Gisborne and castle scientist, realises that lives could be at risk if his latest invention were to fall into the Sheriffs hands. When Lambert won't make more of the invention, an "explosive" black powder, he is put into the dungeons by the furious Sheriff. Much volunteers to get himself arrested so he can help Lambert from within, but will he get more then he has bargained for?