A village on the outskirts of Sherwood Forest is regularly raided by a horde of Mongols. Robin and his band rescue a maiden from the village who has been kidnapped, angering the Mongols. The village elders refuse Robin's help in fighting back against them, fearing too much bloodshed, but the younger citizens are prepared to fight for their freedom.

A band of Vikings capture Prince John, to hold him for ransom, and Robin, who is out hunting with Little John. Robin and his men enable Prince John's escape, but will he live up to his promise to pardon Robin and his men?

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.

Marion sets out to save her young cousin, Iris, from a marriage arranged by her evil sister-in-law, Lady Isabelle, to Lord Garth. Isabelle has told Iris that her intended, Thomas of Glockshire, was killed in the crusades, but he is actually on his way back. He meets Robin and his men, who are on their way to help Marion. Marion saves Iris, and returns to Sherwood, only to find that Robin and his men are now catives in Isabelle's castle, and Marion must now return there to rescue them.

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.

Three beautiful, evil witches take Little John captive, and make him their slave. Robin's band cannot breech the catacombs of the abbey where the witches have taken him, because of the powerful magic they practise. Robin uses a magic potion from Friar Tuck to fake his own death, knowing that his evil Aunt Alice, the Abbess, will entomb him in the family crypt inside the abbey. He thus gains entry to rescue Little John and vanquish the witches.

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

Robin goes to the fiftieth birthday party of his step-mother, where he encounters an old girlfriend. But a band of thieves enter the castle and interrupt the festivities. They round up the guests and steal all their money and trinkets. Robin is seriously wounded in the battle to recover the stolen items. Knowing the castle well, he relies on his cunning to separate the thieves, and lay traps for them in the rooms they find themselves locked in. But Robin faces his biggest battle high on the castle walls.

The God of Healers sent her young daughter, Gwyneth, from Avalon to live amongst mortals many years ago. The beautiful young healer must return home before her twenty-first birthday, or all who have been healed by her hand will die. Unknown to Robin, he was her first healing when he hit his head as a child, an act that was witnessed by his sworn enemy, Sir Guy of Gisborne. Sir Guy, knowing the consequences if she does not make it home, enlists the help of the evil witch Mordrelle, who was banished from Avalon many years ago, to help prevent Gwyneth's return. But Sir Guy is killed in a fight with Robin, and brought back to life by Gwyneth, so putting him in the same position as Robin. Sir Guy has to kill Mordrelle to enable Gwyneth's return to Avalon.

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.

Queen Eleanor of Aquitaine has traveled with some of her Amazon warriors from Jerusalem where they found a fabled map. This map will help her to find the staff of Moses, which according to legend lies in a cave in England. But the sultan Salim is also seeking it, in order to possess its special powers, and he sends his henchmen with Devlin, an antique collector, to follow her. Before Robin and Marion can reach her, the queen is taken captive. They and the Amazons have to rescue the queen from the cave with the staff of Moses, where she is being held by the Sultan's men.

Robin's friend Lord Hazelmere requests his help to forge an alliance of nobles to put an end to Prince John's tyranny once and for all. The time and place of the meeting must remain secret, but Prince John has eyes and ears everywhere. Marion, Little John & Friar Tuck have various adventures bringing the other three participants to the meeting. But their efforts are not enough to keep the secret from Prince John.

Ferris, the son of Lord Glister, who is an old friend of Robin's, is mortally ill. They seek out Jarnsaxa, the last of Femorians, the giants of Ireland, whose breath has the power to heal him. When he is returned to health, he becomes a tyrant. Robin and Jarnsaxa decide to make good their error.

The evil Count Frederick sends his mercenary soldier Geldon to Japan to steal an ancient magical samurai sword. He intends to use it to become King of England, but finds he cannot control its power. Robin joins forces with a young aspiring samurai, Takashi, to return the sword to its rightful owner, and thwart the plans of Count Frederick.

During an attack by Prince John's men on the village of Kingsgrove, Olwyn's acolyte Rowena accidentally sends Robin fifteen years back into the past, where he inadvertantly alters the course of history by rescuing a man who becomes a despotic king. Mortiana is working for him, and she has a magic duel with Rowena, from which Robin has to rescue Rowena before she is killed. The two of them have to work out how to undo Robin's act in the past.

Friar Tuck's help is requested from his former teacher, Father Gedding, to treat Colin, the new young Lord Dundeen, who has been wounded with a poisoned sword. On arrival at Castle Dundeen, Robin finds out that Colin's uncle, Lord Chilton, is responsible for the attack, and that he has also claimed the life of Colin's father, in order to inherit the castle and their wealth. Realising that he has not completely succeeded, Chilton lays siege to the castle and its few remaining inhabitants. Robin and his band must break the siege and put an end to Lord Chilton's designs.

Robin and his band go to a charity wrestling match, where they meet his old friend Theo, who is now the local sheriff. As Little John, "the Celtic Crusader", is winning his bout against "Gargantua", Lord Burnley a noble is assassinated by a crossbow bolt, and the culprit appears to be Friar Tuck, who has just been given a crossbow that he has accidentally shot. Robin must investigate what happened, and prove Tuck's innocence, by identifying the real culprit.

While on his way to the wedding celebrations of his friend Talbot, Robin meets his double, the wicked Jacobi, who has just broken out of a prison transport with five others. After overcoming him, Robin dons his clothes to fool the other escapees to try to put them behind bars again.

Robin, Little John & Friar Tuck volunteer to escort a group of orphan boys to a new home in a town three days ride away. While underway, they discover that hiding amongst them is the young Queen Stephanie, on the run from Sir Mortimer, her cousin who wants to kill her. They are first attacked by a pair of criminals trying to recover some jewelry that one of the boys has stolen from them. Then they are waylaid by Sir Mortimer and his men trying to take Stephanie back, but they only manage to abduct Kyle, one of the boys who happens to be her childhood friend. Robin has to give chase to rescue Kyle, while the others keep the children safe.

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.

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.

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.