BBC Four Wednesday

In the third of the quarter-finals, two teams compete as they try to win two matches to progress to the semi-finals. Jeremy Paxman asks the questions

Three philosophers pit their wits against a trio of Hitchhiker's Guide to the Galaxy fans. Victoria Coren presents

Professor Brian Cox examines the hunt for extra-terrestrials, which has become a matter of serious scientific inquiry over the last few decades

Historians and former officials discuss Hitler's rise to power and reveal the extent to which it was helped by grassroots support for Goering's feared secret police, the Gestapo

Ian Richardson walks up Arthur's Seat, the dormant volcano high above Edinburgh, to which he would escape as a bored office clerk 50 years ago

W Stephen Gilbert looks back on the 1979 BBC drama Only Connect, recalling his struggles of making an openly gay drama for mainstream television

Drama, starring Joseph O'Conor. While researching the British labour movement in the early 20th century, Graham discovers socialist pioneer and gay rights activist Edward Carpenter

The actress reflects on the 1974 drama that featured TV's first lesbian kiss, sharing her memories of how she approached the moment, and the reaction it received

Just as she is about to leave the army, Jackie has an encounter with an old lover. Drama from 1974, starring Alison Steadman and Myra Frances

Simon Sebag Montefiore examines the transformation of Vienna into a great cultural capital after the Ottoman threat receded at the end of the 17th century

Historians and former officials discuss Hitler's rise to power and reveal the extent to which it was helped by grassroots support for Goering's feared secret police, the Gestapo

Three philosophers pit their wits against a trio of Hitchhiker's Guide to the Galaxy fans. Victoria Coren presents

Professor Brian Cox examines the hunt for extra-terrestrials, which has become a matter of serious scientific inquiry over the last few decades