Tunnel Vision is the first episode of Series 4. It is also the only episode co-written with Mark Billingham and David Lloyd as well as Tony Robinson.
There's a games frenzy in Worksop and the Merry men invent a game based on The Crystal Maze only Marian doesn't seem impressed. Meanwhile King John is pushing for a Scunthorpe to Worksop tunnel and Guy is kidnapped...
- Eleoner (Guy's mother): Forbes Collins (Uncredited)
- Double Trouble (Sang by Barrington, Robin Hood and the Peasants)