1. Episode 1

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. 22 June 2023. 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.

2. Episode 2

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. 29 June 2023. 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.

3. Episode 3

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. 6 July 2023. 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.

4. Episode 4

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. 13 July 2023. 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.

5. Episode 5

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. 20 July 2023. 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.

6. Episode 6

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. 27 July 2023. 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.

7. Episode 7

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. 3 August 2023. 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.

8. Episode 8

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. 10 August 2023. 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.

9. Episode 9

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. 17 August 2023. 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.

10. Episode 10

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. 24 August 2023. 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.

11. Episode 11

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. 31 August 2023. 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.

12. The Play-Off

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. 7 September 2023. 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.

13. The Final

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. 14 September 2023. 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.