4/10. The first ever Christmas series champions, from Trinity College, Cambridge, return to take on the Bristol team from Series 8. Amol Rajan asks the questions. Also in HD. [S]
5/10. Teams from Exeter College, Oxford, led by Reeta Chakrabarti, and Trinity Hall, Cambridge, captained by Adam Mars-Jones, return to compete again. Amol Rajan asks the questions. Also in HD. [S]
6/10. Val McDermid captains a team from St Hilda's College, Oxford, and Cath Slessor leads a team of Edinburgh alumni. Amol Rajan asks the questions. Also in HD. [S]
7/10. In the final heat, Series 13 champions Middlesex face a Lancaster team that reached the semi-finals of Series 3. Amol Rajan asks the questions. Also in HD. [S]
8/10. It's the first semi-final of this special all-star seasonal series. Two of the highest-scoring winning teams from the heats return to play again. Amol Rajan asks the questions. Also in HD. [S]
10/10. It's the grand final of the Christmas competition, in which teams of notable former students compete on behalf of their alma maters. Jeremy Paxman asks the questions. Also in HD. [S]
9/10. Two of the four highest-scoring winning teams from the heats return to play the second of this year's semi-finals. Jeremy Paxman asks the questions. Also in HD. [S]
5/10. Four alumni of the University of Hull face four graduates of the University of the West of England. Jeremy Paxman asks the questions. Also in HD. [S]
1/10. SOAS play Balliol College, Oxford, as University Challenge's annual Christmas competition for teams of distinguished alumni kicks off. Jeremy Paxman asks the questions. Also in HD. [S]
6/10. It's the penultimate match of the first round in the Christmas quiz for grown-ups, with both teams doing battle for a place in the semi-finals. Jeremy Paxman asks the questions. Also in HD. [S]
2/10. It's the second match of the Christmas quiz, with two teams of graduates fighting it out for a place in the semi-finals. Jeremy Paxman asks the questions. Also in HD. [S]
1/10. It's the opening match of the Christmas quiz for grown-ups, with two teams doing battle for a place in the semi-finals. Jeremy Paxman asks the questions. Also in HD. [S]
7/10. In the last first-round match, Edinburgh University, including Joanna Cherry and Mitch Benn, face the LSE team, with Ekow Eshun and Maya Jaggi. [S]
6/10. Sheffield University, with Lord David Blunkett and Paul Mason, face Manchester University, with David Aaronovitch and Matt Allwright. Also in HD. [S]
6/10. Series featuring distinguished graduates. Adam Hart-Davis and Helen Geake from the University of York face Jim Al-Khalili and Susan Blackmore from the University of Surrey. Also in HD. [S]
4/10. Series featuring distinguished graduates. Philippa Gregory and Allan Little from the University of Edinburgh face James Mates and Jacqui Oatley from the University of Leeds. Also in HD. [S]
3/10. Series featuring teams of distinguished graduates. Martin Bell and Bishop David Walker from King's College, Cambridge, play Francis Wheen and Valerie Vaz from Royal Holloway. Also in HD. [S]