1Week 1: Monday
Naga Munchetty, Jordan Stephens, Sally Lindsay and David O'Doherty take on a series of challenging quiz games selected by the host, teatime quiz legend Richard Osman.
2Week 1: Tuesday
Naga Munchetty, Jordan Stephens, Sally Lindsay and David O'Doherty take on a series of challenging quiz games selected by the host, teatime quiz legend Richard Osman.
3Week 1: Wednesday
Naga Munchetty, Jordan Stephens, Sally Lindsay and David O'Doherty take on a series of challenging quiz games selected by the host, teatime quiz legend Richard Osman.
4Week 1: Thursday
Naga Munchetty, Jordan Stephens, Sally Lindsay and David O'Doherty take on a series of challenging quiz games selected by the host, teatime quiz legend Richard Osman.
5Week 1: Friday
Naga Munchetty, Jordan Stephens, Sally Lindsay and David O'Doherty take on a series of challenging quiz games. One of the week's celebrities is crowned champion.
6Week 2: Monday
Richard Osman hosts as comedian Ellie Taylor, actor and writer Steve Pemberton, presenter Fern Britton and comedian Josh Widdicombe test their general knowledge skills.
7Week 2: Tuesday
Richard Osman hosts as comedian Ellie Taylor, actor and writer Steve Pemberton, presenter Fern Britton and comedian Josh Widdicombe test their general knowledge skills.
8Week 2: Wednesday
Richard Osman hosts as comedian Ellie Taylor, actor and writer Steve Pemberton, presenter Fern Britton and comedian Josh Widdicombe test their general knowledge skills.
9Week 2: Thursday
Richard Osman hosts as comedian Ellie Taylor, actor and writer Steve Pemberton, presenter Fern Britton and comedian Josh Widdicombe test their general knowledge skills.
10Week 2: Friday
Richard Osman hosts as comedian Ellie Taylor, actor and writer Steve Pemberton, presenter Fern Britton and comedian Josh Widdicombe test their general knowledge skills.
11Week 3: Monday
Richard Osman hosts as comedian Shappi Khorsandi, journalist and newsreader Michael Buerk, actress Amanda Abbington and comedian Elis James test their general knowledge skills.
12Week 3: Tuesday
Richard Osman hosts as comedian Shappi Khorsandi, journalist and newsreader Michael Buerk, actress Amanda Abbington and comedian Elis James test their general knowledge skills.
13Week 3: Wednesday
Richard Osman hosts as comedian Shappi Khorsandi, journalist and newsreader Michael Buerk, actress Amanda Abbington and comedian Elis James test their general knowledge skills.
14Week 3: Thursday
Richard Osman hosts as comedian Shappi Khorsandi, journalist and newsreader Michael Buerk, actress Amanda Abbington and comedian Elis James test their general knowledge skills.
15Week 3: Friday
Richard Osman hosts as Shappi Khorsandi, Michael Buerk, Amanda Abbington and Elis James test their general knowledge skills and one is crowned champion.
16Week 4: Monday
Richard Osman hosts as actress Beattie Edmondson, journalist Amol Rajan, presenter Gaby Roslin and comedian Hugh Dennis test their general knowledge skills.
17Week 4: Tuesday
Richard Osman hosts as actress Beattie Edmondson, journalist Amol Rajan, presenter Gaby Roslin and comedian Hugh Dennis test their general knowledge skills.
18Week 4: Wednesday
Richard Osman hosts as actress Beattie Edmondson, journalist Amol Rajan, presenter Gaby Roslin and comedian Hugh Dennis test their general knowledge skills.
19Week 4: Thursday
Richard Osman hosts as actress Beattie Edmondson, journalist Amol Rajan, presenter Gaby Roslin and comedian Hugh Dennis test their general knowledge skills.
20Week 4: Friday
Richard Osman hosts as Beattie Edmondson, Amol Rajan, Gaby Roslin and Hugh Dennis test their general knowledge skills. The week's champion is crowned.
21Week 5: Monday
Richard Osman hosts as actress Chizzy Akudolu, author and comedian Charlie Higson, historian Kate Williams and comedian Tom Allen test their general knowledge skills.
22Week 5: Tuesday
Richard Osman hosts as actress Chizzy Akudolu, author and comedian Charlie Higson, historian Kate Williams and comedian Tom Allen test their general knowledge skills.
23Week 5: Wednesday
Richard Osman hosts as actress Chizzy Akudolu, author and comedian Charlie Higson, historian Kate Williams and comedian Tom Allen test their general knowledge skills.
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Week 5: Thursday
Richard Osman hosts as actress Chizzy Akudolu, author and comedian Charlie Higson, historian Kate Williams and comedian Tom Allen test their general knowledge skills.
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Week 5: Friday
Richard Osman hosts as Chizzy Akudolu, Charlie Higson, Kate Williams and Tom Allen test their general knowledge skills. The week's winner is crowned.
26Week 6: Monday
Mathematician Rachel Riley, singer and farmer JB Gill, newscaster Katie Derham and comedian Richard Herring take on a series of challenging quiz games selected by Richard Osman.
27Week 6: Tuesday
Rachel Riley, JB Gill, Katie Derham and Richard Herring take on a series of challenging quiz games across one week, selected by host and teatime quiz favourite Richard Osman.
28Week 6: Wednesday
Over five days, Rachel Riley, JB Gill, Katie Derham and Richard Herring take on a series of challenging quiz games selected by host and teatime quiz favourite Richard Osman.
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Week 6: Thursday
Over five days, Rachel Riley, JB Gill, Katie Derham and Richard Herring take on a series of challenging quiz games selected by host and teatime quiz favourite Richard Osman.
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Week 6: Friday
Rachel Riley, JB Gill, Katie Derham and Richard Herring take on a series of challenging games selected by teatime quiz favourite Richard Osman. The week's champion is crowned.
31Week 7: Monday
Comedian Lolly Adefope, journalist and presenter Dan Walker, presenter Sarah Greene and comedian Miles Jupp take on a series of challenging quiz games selected by Richard Osman.
32Week 7: Tuesday
Comedian Lolly Adefope, journalist and presenter Dan Walker, presenter Sarah Greene and comedian Miles Jupp take on a series of challenging quiz games selected by Richard Osman.
33Week 7: Wednesday
Comedian Lolly Adefope, journalist and presenter Dan Walker, presenter Sarah Greene and comedian Miles Jupp take on a series of challenging quiz games selected by Richard Osman.
34Week 7: Thursday
Comedian Lolly Adefope, journalist and presenter Dan Walker, presenter Sarah Greene and comedian Miles Jupp take on a series of challenging quiz games selected by Richard Osman.
35Week 7: Friday
Lolly Adefope, Dan Walker, Sarah Greene and Miles Jupp take on their final series of quiz games before the week's winner is crowned.
36Week 8: Monday
Every day this week Samantha Womack, Rory Reid, Anne Diamond and James Acaster take on a series of challenging quiz games selected by the host, teatime quiz legend Richard Osman.
37Week 8: Tuesday
Every day this week Samantha Womack, Rory Reid, Anne Diamond and James Acaster take on a series of challenging quiz games selected by the host, teatime quiz legend Richard Osman.
38Week 8: Wednesday
Every day this week Samantha Womack, Rory Reid, Anne Diamond and James Acaster take on a series of challenging quiz games selected by the host, teatime quiz legend Richard Osman.
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Week 8: Thursday
Every day this week Samantha Womack, Rory Reid, Anne Diamond and James Acaster take on a series of challenging quiz games selected by the host, teatime quiz legend Richard Osman.
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Week 8: Friday
Samantha Womack, Rory Reid, Anne Diamond and James Acaster take on a series of challenging quiz games and the week's overall winner is crowned.
41Week 9: Monday
Every day this week presenter Kelly Cates, actor Tyger Drew-Honey, comedian Desiree Burch and journalist Matt Allwright take on a series of quiz games selected by Richard Osman.
42Week 9: Tuesday
Every day this week presenter Kelly Cates, actor Tyger Drew-Honey, comedian Desiree Burch and journalist Matt Allwright take on a series of quiz games selected by Richard Osman.
43Week 9: Wednesday
Every day this week presenter Kelly Cates, actor Tyger Drew-Honey, comedian Desiree Burch and journalist Matt Allwright take on a series of quiz games selected by Richard Osman.
44Week 9: Thursday
Every day this week presenter Kelly Cates, actor Tyger Drew-Honey, comedian Desiree Burch and journalist Matt Allwright take on a series of quiz games selected by Richard Osman.
45Week 9: Friday
Presenter Kelly Cates, actor Tyger Drew-Honey, comedian Desiree Burch and journalist Matt Allwright take on a series of quiz games. The week's overall winner is crowned.
46Week 10: Monday
Lexicographer Susie Dent, newsreader Nick Owen, alpine ski racer Chemmy Alcott and comedian Dane Baptiste take on a series of challenging quiz games selected by Richard Osman.
47Week 10: Tuesday
Lexicographer Susie Dent, newsreader Nick Owen, alpine ski racer Chemmy Alcott and comedian Dane Baptiste take on a series of challenging quiz games selected by Richard Osman.
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Week 10: Wednesday
Lexicographer Susie Dent, newsreader Nick Owen, alpine ski racer Chemmy Alcott and comedian Dane Baptiste take on a series of challenging quiz games selected by Richard Osman.
49Week 10: Thursday
Lexicographer Susie Dent, newsreader Nick Owen, alpine ski racer Chemmy Alcott and comedian Dane Baptiste take on a series of challenging quiz games selected by Richard Osman.
50Week 10: Friday
Susie Dent, Nick Owen, Chemmy Alcott and Dane Baptiste take their final series of challenging quiz games and the week's overall champion is crowned.