Three Tolkien fans take on a church team in the first of the series.

A team of geocachers takes on a trio with an interest in Vikings.

A team of reptile lovers take on three background actors.

A team of environmentalists takes on a trio who enjoy tackling escape rooms.

A team of former physicists takes on a trio united by their love of Belgium.

A team of boardgamers, led by University Challenge alum Gail Trimble, takes on three lovers of Latin cuisine.

In this heat, three cricket fans take on a team of professional question setters.

A team of solo applicants take on three teachers.

A team of former strangers who met on a quiz app take on three public school teachers.

A team of fashion fans takes on a group of football coaches.

A team of darts players takes on three AFC Wimbledon supporters.

A team of Sherlock Holmes fans take on three theatre workers in the last of the opening heats.

A team of Vikings takes on a squad of parishioners.

The Eco-Warriors take on the Snake Charmers in a round two game.

The Meeples and Belgophiles return for this round two game.

The Wanderers and Inquisitors return for a round-two game.

The Dandies and Beaks return for this round two game.

The Detectives and the Arrowheads return for this round two game.

Round two losers the Meeples and Parishioners return for their last chance to stay in the competition.

Round two losers Snake Charmers and the Inquisitors return for one final chance to stay in the competition.

Round two losers the Dandies and the Arrowheads return for one final chance to stay in the competition.

Round two losers the Cricketers and the Escapologists return for one final chance to stay in the competition.

Round two losers the Meeples and the Inquisitors return for one final chance to stay in the competition.

Round two losers the Dandies and the Escapologists return for one final chance to stay in the competition.

The first third-round match of the competition as the Eco-Warriors take on the Inquisitors for a place in the quarter-finals of the quiz.

The second third-round match of the competition as the Wanderers take on the Vikings for a place in the quarter-finals.

Another third-round match as the Detectives take on the Escapologists for a place in the quarter-finals of the quiz.

Another third-round match as the Belgophiles take on the Beaks for a place in the quarter-finals of the quiz.

Round three losers the Wanderers and the Eco-Warriors return for one final chance to stay in the competition.

Round three losers the Detectives and the Beaks return for one final chance to stay in the competition.