Episode 1 | Politicos v Felinophiles

A trio of political enthusiasts compete against three cat lovers to draw together connections between seemingly unrelated things.

Episode 2 | History Boys v Oxonians

Three historians take on a team from Oxford. They compete to draw together connections between things.

Episode 3 | Wandering Minstrels v Gallifreyans

Three musicians take on a team of Doctor Who fans. They compete to draw together connections between things.

Episode 4 | QI Elves v Bibliophiles

A team of researchers from QI take on a trio of book lovers. They'll compete to draw together connections between things.

Episode 5 | Coders v Gamesmasters

Three coders square up to a team of video gamers. They'll compete to draw together connections between things.

Episode 6 | Chessmen v Linguists

A team of chess fans meet a team of linguists. They'll compete to draw together connections between things.

Episode 7 | Orienteers v Romantics

A team of orienteers take on three old-fashioned romantics. They'll compete to draw together connections between things.

Episode 8 | Nørdiphiles v Nightwatchmen

A trio of Norway-lovers take on three cricket fans. They'll compete to draw together connections between things.

Episode 9 | Politicos v Oxonians

Two teams of first-round losers return for a second chance to stay in tournament. They'll compete to draw together connections between things.

Episode 10 | Wandering Minstrels v Chessmen

Two more teams of first-round losers return for a second chance to stay in tournament.

Episode 11 | Children in Need: Noggins v Curiosities

Two more teams of first-round losers return for a second chance to stay in tournament.

Episode 12 | Coders v Romantics

Two more teams of first-round losers return for a second chance to stay in tournament.

Episode 13 | QI Elves v Nightwatchmen

Two teams who won their first heat return in hope of securing a place in quarter-finals.

Episode 14 | History Boys v Felinophiles

Two teams who won their first heat return in hope of securing a place in quarter-finals.

Episode 15 | Linguists v Gallifreyans

Two more first-round winners return in hope of securing a place in quarter-finals.

Episode 16 | Orienteers v Gamesmasters

Two more first-round winners return in hope of securing a place in quarter-finals.

Episode 17 | Nørdiphiles v Bibliøphiles

A trio of chess players and three cat lovers return for a last chance at making it to quarter-finals.

Episode 18 | Chessmen v Felinophiles

A trio of chess players and three cat lovers fight for a quarter-final place.

Episode 19 | Linguists v Oxonians

A team of book lovers take on three video gamers in a bid to secure a place in quarter-finals.

Episode 20 | Bibliophiles v Gamesmasters

The QI Elves take on three computer experts as they compete to win a place in quarter-finals.

Episode 21 | QI Elves v Coders

In this quarter-final, three historians take on a trio of linguists. So join Victoria Coren Mitchell if you want to know what connects Susan, Surajprasad, Staples and Stearns.

Episode 22 | History Boys v Linguists

In second of quarter-finals, Orienteers face up to a team of video game enthusiasts.

Episode 23 | Orienteers v Gamesmasters

The QI Elves return in this quarter-final. They compete against Nordiphiles to draw together connection between things.

Episode 24 | Nørdiphiles v QI Elves

Three chess players take on a team of Doctor Who fans in last of quarter-finals. So join Victoria Coren Mitchell if you want to know what connects memory stick, jazzercise, jacuzzi and portaloo.

Episode 25 | Chessmen v Gallifreyans

In first of semi-finals a trio of chess aficionados take on three history buffs in a bid to win their place in series finale.

Episode 26 | Comic Relief Special: Waterbabies v Tillers

In last of semi-finals a team of orienteers take on QI Elves in a bid to win their place in series finale.

Episode 27 | Chessmen v History Boys

In series finale, Orienteers and Chessmen battle it out to be named Only Connect champions.

Episode 28 | Orienteers v QI Elves

In this special Children in Need episode, two teams of celebrities put their collective reputations on line in name of charity.

Episode 29 | Orienteers v Chessmen