A team of ex-psychology students take on three knitting enthusiasts.
Three crossword enthusiasts pits their wits against a team of alumni from Birkbeck College, London.
A team of county councillors from Wales take on three local government ombudsmen from England.
Three popular science writers face a team of travel writers.
Teams of scrabble enthusiasts from Scotland and the south of England take on each other.
Three London-based cycling friends pit their wits against a team of Welsh ramblers.
Three bankers take on a team made up of a librarian, a researcher, and a tax advisor.
Two teams of supporters of some form, face off against each other.
In the first quarter-final, returning teams of county councillors and popular science writers face each other.
Quarter-final.
Quarter-final.
Quarter-final.
Semi-final.
Semi-final.
Final.