Merlin, the mentor of King Arthur while he was still a youth, summons Rowena and Robin from the future, so that Robin can help train him in combat. Morganna, Merlin's archenemy, wants to kill Arthur, so that the Black Knight can win Excalibur and become king. Robin helps Arthur fulfill his destiny.

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.

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.

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.

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 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 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.

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.

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.

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.

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.