Lord Cloughton arranges a summit with three important Normans to conspire with the Saxons against King John. Each member of Robin's band undertakes to fetch one of the participants, protecting them from the men of Count Rood, who wants to prevent the meeting: Robin fetches the suspicious and reluctant Countess DuMonde, Marion fetches the agoraphobic young Count Lucerne, and Friar Tuck fetches Count Brouchard (who turns out to be Barkley), while Little John protects Lord Cloughton. Rood hires a mysterious assassin, who can morph into many different people and creatures, to help prevent the meeting.

Marion sees a giant fireball fall from the sky into Sherwood Forest, and rushes off in search of what it has brought. When she reaches the site, she discovers a strange, diamond-encrusted creature. She befriends him, and tries to help him discover what he needs to return home. Lady Claudia has also seen the fireball and sends Barkley to follow its path, and gather the untold riches that she believes it is supposed to provide. When Marion does not return to camp, Robin sets out to find her. Then he and Marion must fight to save the creature from the grasp of Lady Claudia's men, and help it return to its ship.

A mysterious black castle, occupied by an evil creature, has the power to wreak havoc on the world and destroy it. Olwyn, the ancient magician, tells Robin he must discover the architecture of the old castle and learn its secrets in order to kill the creature and nullify the castle's powers. But first Robin has to rescue the family of the Engineer, who are being held captive inside.

Robin and his men rob a gambling house, and make a mortal enemy of its owner, Simon Asher. Robin is overpowered and captured by a quartet of aristocratic huntsmen: Master Chu, Lord Henry, Lord Spire and Mr. Fox. They offer Robin a chance of survival by playing a game of hunting, with Robin as the prey. To ensure his cooperation, they are holding Friar Tuck hostage.

Master Ika returns, and sets a bomb trap for Robin and his band. Sir Guy of Gisborne has returned from the crusades purporting to be a changed man, and saves Marion from being injured in a fight: he still loves her, and persues her again. But it was Sir Guy who hired the Japanese assassin to set the trap for Robin. Sir Guy leaves a note for Robin to find, which will lead him into another deadly explosive trap. Marion declares to Guy that she loves Robin, not him, and goes off to follow Robin. Sir Guy realizes that Marion is now going to fall into the trap intended for Robin. So both Guy and Robin have to work together to save her.

Robin saves a beautiful young woman, Gwynedd, disguised as a nun, on the road to the town of Royston. She has been searching for him to enlist his help in saving her sister, Bernadette, who is to be hanged if she does not allow herself to be married against her wishes to Drugo, the henchman of the evil Baron Royston. Together they plan to defeat the evil villains who run the town. Meanwhile, Little John's sister Ingrid wants to go to Royston to try to find herself a husband, but Little John thinks it is too dangerous and locks her up to prevent her going. Of course, this doesn't stop her for long, and she ends up in Royston in the middle of the raid to rescue Gwynedd.

The slavetrader Brand kidnaps Robin's friend Kemal and his bride, Princess Kadija, and plans to auction them. Marion also has a score to settle with him, from her distant past. Robin and his band pretend to be rich bidders, as part of the scheme to free the two prisoners and get Marion's revenge. But Brand escapes with Kadija into the Forbidden Zone, where Robin and his band are forced to follow and battle him.

Robin is warned by a young boy that Merlin's sceptre is in the hands of the wicked magician Malenoch, who has returned from the dead and decided to take over the kingdom of England using an army of soldiers he has also brought back from the dead. As students who trained under Merlin, Olwyn and Prince John's sourceress Mortiana must team up to destroy the evil tyrant first. Olwyn requests the help of Robin Hood and his band, and they are even assisted by Prince John's men, in the quest to wrest the sceptre from Malenoch's control.

The wicked Norman Lord Rupert uses his son Gregory to wage a campaign of terror to pressurise the Saxon farmers into handing over their land to him. The plan proceeds until he takes over some property of Little John's brother, when Robin and his band arrive and decide to intervene to organise some resistance. In the ensuing fight Robin captures Gregory, but Lord Rupert counters by capturing Joshua, the son of the local judge, Marcus of Brandwyn. So Robin now has to rescue Joshua from Lord Rupert's castle.

Robin and his band visit the annual Robin Hood Foundation awards in the village of Robinville, which was named after him after he freed it from the rule of the brutal Lord Argot. But Argot's son is still seeking revenge, and plans to blow sky high the old castle where the feast is taking place, together with Robin, his band and the villagers.

After a day's fishing with Robin, Marion gets a ride back to the village with a passing tinker, but on the journey he overpowers her and takes her to be held captive with several other women. Robin tries to track her down, but no-one in the local village will admit to having seen her. Back in the forest, he is eventually forced to ask the help of Clement the Hermit, whom everyone believes is mad. Meanwhile, Little John's sister Ingrid is about to get married to a boring farmer named Bellamy, when she suddenly disappears. Little John and Friar Tuck follow her trail to the same stronghold hidden in the forest that Clement has shown Robin. Their combined might is required to free Marion and the other captives.

Friar Tuck holds a charity auction, in which one of the lots is a date with Robin. When Robin learns that his father may still be alive, he goes off in search of his father, but he turns out to be an impersonation by a sourceress, and he has to battle her and another sourcerer before he can return to the auction. Meanwhile Friar Tuck has to hold off the women of the village, who are becoming impatient with Robin's absence.

Little John feels worthless and second best to Robin, and leaves the camp to make his own way in the world. He enters a contest to join the ultimate army, not realizing it is being developed by the evil Lord Malice for his destructive ends. Meanwhile, Robin discovers that his former teacher, Andrew MacGregor, has been captured by Malice. He and Marion must enter the contest to win and be able to join the same army as Little John. They also discover their friend Kemal, a battle-hardened nomad, has joined the army ranks, and together they try to rescue MacGregor, and thwart Lord Malice's plans

Prince John is trying to make a fortress in the north of England, in case King Richard returns from the crusades. His Elite Guard and their commander Capt Hilts seize Lord Nicholas Beacon, the husband of Olivia, who was once engaged to be married to Robin. Robin and Marion must suppress their feelings and help her rescue her husband, and thwart Prince John's plans.

Robin and his band try to thwart the banditry of Patrick, Earl of Glenbauer, by protecting a village on his warpath. Rowena accidentally conjures up a monster, Cerradyn, who is a master huntsman. He needs to capture and sacrifice seven warriors to realise his full powers and become invincible. It is not until he has captured six that Tuck and Rowena discover what is happening, and learn that only Rowena can make him disappear. They track him to his lair in a race against time.

Robin plans a surprise birthday party for Marion, but is killed while defending her in a fight to capture some of Prince John's gold. Because he died too early, his soul is sent back to Earth, but has to find another body to inhabit, as his has already been cremated. Robin is helped by Ripley, an envoy from the realm of the dead, who enables Robin to temporarily take over the body of the man he has just killed, Briggs, and by Olwyn's apprentice, Rowena, who tries to get him his own body back.

Marion is abducted by Brother Groliet, an evil member of the God of Death cult. She is intended to become the bride of Balor, the Prince of Darkness, to have a child and give him the power of eternal life. Marion refuses, and is cast into a deep spell. Only Robin can obtain the horn of a unicorn, which is the only source of power strong enough to destroy the evil Lord of Death

Robin meets a young boy, Patrick, who leads a group of orphans on the run from Prince John's soldiers. On taking the boy back to camp he discovers that he is a real hand full. The boy knocks Robin unconscious, and escapes to reassemble his group in the woods. While unconscious, Robin recalls his encounter with the magician, Olwyn. He was then about the same age as Patrick, and also running for his life in the forest from the men who killed his father, the Earl of Locksley, and sacked their home, leaving Robin a penniless orphan. Olwyn offered Robin refuge, and told him he was the chosen one. Friar Tuck convinces Patrick to give all his booty to Robin's cause.

The fanatical Father Dutton has sworn to end the old Celtic beliefs in England. He imprisons the druid priests of his village. But some of the villagers don't agree with this and help them. Dutton attacks the helpers, and one of the wounded survivors slips away to seek Robin's help. When he hears what Dutton is doing, he decides to put an end to the priest's plans.

Robin and his band visit the market in a small town where they have many friends, including the sorceresses Rowena and Bathsheba. They learn that a local man, Jesse Galt, is missing, and was last seen entering a strange castle. They go to the castle to find him, but when they enter, they are each confronted with their own secret fear: Marion with her giving up of a more normal life; Little John with his fear of creepy-crawlies; Friar Tuck with the seven deadly sins; and Robin with his decision to leave his father and hide when Locksley Castle was attacked. If they cannot overcome their fears and leave the castle before dawn, they will remain trapped there forever.

On Prince John's orders, Captain Delouche, an evil knight armed with magic, impenetrable armor, rounds up many young women from the Sherwood Forest area for a beauty contest, with marriage to Delouche for the winner and a sacrificial death for the loser. The abducted women include Little John's sister, Natalie. The magic armor can only be defeated by the Golden Arrow, which Robin has to take from Prince John's castle, and use against Delouche, to rescue the maidens.

The Saxon Lord Sedgewick owes a large amount in taxes to Prince John, and if he doesn't pay, his granddaughter, Lady Pamela, will have to marry Sir Gilbert. So she requests Robin's help. Robin enters a contest, The Race Against Death, devised by Prince John, with a huge sum of money as prize, but finds it is rigged against him. Robin ends up needing to be rescued by his men from inside the castle.

Baragon is an evil creature, more than 300 years old, who has to keep drinking the blood of the innocent to keep him young and strong. To break out of this cycle, he makes a pact with the dark lord Orone to deliver Robin to him. His assistant captures members of Little John's family, and then Robin himself. Marion has to lead their rescue from the castle.

An evil warrior from the Middle East seeks to make Marion part of his harem.

When Robin humiliates Prince John by stealing his money, Prince John vows to kill Robin once and for all. He trades one year of his life to the sourceress Mortiana so that she may bring back to life three of Alexander the Great's dead warriors. When the warriors can't capture Robin, they capture Marion, to act as bait. Ignoring fear for his own life, Robin enters the castle to rescue Marion from the clutches of the evil men.