Air date: 2023-06-22

Runtime: 60 min

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

Air date: 2023-06-29

Runtime: 60 min

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

Air date: 2023-07-06

Runtime: 60 min

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

Air date: 2023-07-13

Runtime: 60 min

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

Air date: 2023-07-20

Runtime: 60 min

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.

Air date: 2023-07-27

Runtime: 60 min

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.

Air date: 2023-08-03

Runtime: 60 min

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.

Air date: 2023-08-10

Runtime: 60 min

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.

Air date: 2023-08-17

Runtime: 60 min

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.

Air date: 2023-08-24

Runtime: 60 min

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.

Air date: 2023-08-31

Runtime: 60 min

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.

Air date: 2023-09-07

Runtime: 60 min

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.

Air date: 2023-09-14

Runtime: 60 min

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