In the first episode of the series, contestants from London, Worcester, Barry, Derby and West Kilbride take on five rounds of fiendish puzzles.

Brand-new quiz show presented by Lucy Worsley. Contestants from Guildford, Bristol, Somerset, Ormskirk, London and Dingwall take on five rounds of fiendish puzzles.

Lucy Worsley presents the new quiz show. Contestants from Derby, Gloucestershire, Croydon, Swadlincote, South Wales and Warwick take on five rounds of fiendish puzzles.

Lucy Worsley presents the new quiz show. Contestants from Rochdale, Wirral, Bath, Dumferline, Edinburgh and Liverpool take on five rounds of fiendish puzzles.

Six contestants from Worcester, London, Rotherham and Kent take on five rounds of fiendish puzzles testing language skills, calculation, lateral thinking, visual intelligence and memory.

Contestants from Portsmouth, Essex, Manchester, London and Derbyshire take on five rounds of fiendish puzzles as they attempt to qualify for the series Grand Final.

Contestants from Birmingham, Blackburn, London, Manchester and Croydon take on five rounds of fiendish puzzles as they attempt to qualify for the series Grand Final.

Contestants from Edinburgh, Coulsdon, Poole, Tenbury Wells, London and Sheffield take on five rounds of fiendish puzzles in a bid to qualify for the series Grand Final.

Contestants from Bristol, London, Bromborough, Aberdeen, Fordingbridge and Croydon take on five rounds of fiendish puzzles as they attempt to qualify for the series Grand Final.

Contestants from Thetford, Oxford, Powys, Staffordshire, Nottingham and Porth take on five rounds of fiendish puzzles as they attempt to qualify for the series Grand Final.

In the final round before the semi-final, Lucy Worsley puts players from Leeds, Pontypool, Norfolk, Belfast, Derbyshire and London through their paces in five demanding rounds of puzzles.

Six contestants from around the UK have made it to the play-off to take on five rounds of fiendish puzzles as they attempt to qualify for the Grand Final.

It's the Grand Final and our contestants take on five rounds of fiendish puzzles as they attempt to become the Ultimate Puzzler.