A team of film buffs take on three cocktail aficionados. So join Victoria Coren Mitchell if you want to know what connects Daddy Warbucks, Ellen Ripley, Sherlock Holmes and Bobby Ewing.
A team of collectors take on three railway enthusiasts. So join Victoria Coren Mitchell if you want to know what connects Llanelli RFC, A for adultery, Sir Percy Blakeney and Sherlock Holmes debut.
A team of musicians take on three publishers in this edition. So join Victoria Coren Mitchell if you want to know what connects flag of Vietnam, Google Os, MCC tie and Rupert Bear's clothes.
A trio of road trippers take on three fans of Greece in this edition. So join Victoria Coren Mitchell if you want to know what connects Elizabeth and James, Menace II Society, Harvard Connection and I'm Gonna Be.
A team of scientists square up to a team of builders in last of heats. So join Victoria Coren Mitchell if you want to know what connects The Raven, Little Weed, Seagulls in Finding Nemo and Hodor.
A team of Wayfarers take on a trio of musicians. So join Victoria Coren Mitchell if you want to know what connects numbat, echidna, pangolin and aardvark.
Three scientists take on a team of Athenians. So join Victoria Coren Mitchell if you want to know what connects Einsteinium, names of Allah, 1974 Lions call and Luftballons.
The Scientists and String Section return in first of quarter-finals. So join Victoria Coren Mitchell if you want to know what connects Memoir: My Life, Song: Your Life, Film: September and Novella: The Life of Ivan Denisovich.
The Yorkers and Operational Researchers return in second quarter-final. So join Victoria Coren Mitchell if you want to know what connects Rebecca, Cold, Western and Judean People's Front.
The Cluesmiths and Railwaymen return for a quarter-final match. So join Victoria Coren Mitchell if you want to know what connects ADN, TVA, SIDA and OTAN.
The Wayfarers and Bookworms return for a quarter-final match. So join Victoria Coren Mitchell if you want to know what connects General Tom Thumb, 'Sonny' Liston, Chuck Berry and Lewis Carroll.
In second semi-final, two returning teams compete for a place in grand final. So join Victoria Coren Mitchell if you want to know what connects 'blending', 'changing', 'like smoke' and light-dark'.
In this Sport Relief special, Royal III - David Baddiel, Dr John Cooper Clarke and Philippa Gregory - square up to BBC - Hugh Dennis, Julian Lloyd Webber and Lynne Truss.