Synopsis
The Sheriff and King John have cooked up a scheme to build a tunnel to Scunthorpe. Meanwhile, Sherwood Forest is in the midst of a gaming craze – with the Merry Men playing "Chronic the Hedgehog" and "Dungeons & Dragons". Rose kidnaps Guy just as his mother appears, and Gary and Graeme wade through a parody of The Crystal Maze with Richard O'Brien stand-in "Robin O'Hood", which leads to the Sheriff losing track of reality and fantasy when presented with the Used Tissue of Invisibility. Note: This is the only episode to be co-written by Mark Billingham and David Lloyd alongside Tony Robinson.

Maid Marian and Her Merry Men | S4E7: Journey to the Bottom of the Forest
Rabies is lazy, so much so that many of the Merry Men's plans simply do not work because of him. However, the robbery of a battleship and its subsequent launch take the Merry Men to the parallel universe of Engyland, where Rabies' arrival has been eagerly awaited by the good people of Workflop, particularly the Nottyman, to save them from the wicked witch.

Maid Marian and Her Merry Men | S4E6: The Nice Sumatran
Marian attempts to scare off King John, who is actually scared off, surrendering his crown to Guy. He takes refuge with the Merry Men, who reluctantly decide to follow the example of the Nice Sumatran towards unfortunate rich people and agree to let him stay. However, relations with the new guest deteriorate and Marian realises she has to scare Guy into surrendering the crown to King John again, which requires an unlikely alliance with the Sheriff.