Air date: 2011-08-15

Runtime: 29 min

A trio of social networkers who met online take on three committed vegetarians.

Air date: 2011-08-22

Runtime: 29 min

A father, son, and daughter-in-law square up to three postgraduate chemistry students from Oxford University.

Air date: 2011-08-29

Runtime: 29 min

A team of professional analysts with degrees in modern languages, English, and maths pit their wits against a trio of editors who delight in their meticulous attention to detail.

Air date: 2011-09-05

Runtime: 29 min

A classics graduate, a maths graduate, and a history graduate united by a shared love of running face up to three colleagues from a creative engineering company.

Air date: 2011-09-12

Runtime: 29 min

A husband and wife and their best friend who share a passion for managing online football teams take on three friends from London with a collective love of all things historical.

Air date: 2011-09-19

Runtime: 29 min

Three friends with a mutual love of the Listener crossword puzzle pit their wits against a trio of choristers from Sheffield University.

Air date: 2011-09-26

Runtime: 29 min

A software developer, IT manager, and marketing manager who all row in the same boat take on three ladies with a shared passion for foreign languages.

Air date: 2011-10-03

Runtime: 29 min

Three aficionados of the Scottish rock music scene pit their wits against three members of an executive council trade union group.

Air date: 2011-10-10

Runtime: 29 min

Three online pals take on a trio of history buffs in the first of the quarter-finals.

Air date: 2011-10-17

Runtime: 29 min

A team of rowers encounter three fans of the Listener crossword in the second of the quarter-finals.

Air date: 2011-10-24

Runtime: 29 min

A father, son, and daughter-in-law pit their wits against three members of an executive council trade union group in the third of the quarter-finals.

Air date: 2011-10-31

Runtime: 29 min

Three professional analysts square up to three colleagues at a creative engineering firm in the last of the quarter-finals.

Air date: 2011-11-07

Runtime: 29 min

In the first of the semi-finals, three fans of the Listener crossword take on a trio united by their love of all things historical.

Air date: 2011-11-21

Runtime: 29 min

In the second semi-final, a trio of analysts and three members of an executive council trade union group fight it out for a place in the series finale.

Air date: 2011-11-28

Runtime: 29 min

A trio of Listener crossword fans and three members of an executive council trade union group compete in the 3rd/4th place play-off.

Air date: 2011-12-05

Runtime: 29 min

In the series finale, three professional analysts square up to a trio of history buffs for the right to be named series five champions.