12:55 AM - 02:25 AM
The Kenneth Williams Story: A Reputations Special
Documentary exploring Britain's funniest and most complex comic performer. Contains some strong language. [S]
02:25 AM - 03:25 AM
Horizon: The End of the Solar System - S52 Ep5
5/17. The story of how our solar system will be transformed by the ageing sun before coming to a spectacular end in about eight billion years. [S,SL] [HD]
03:25 AM - 05:30 AM
This is BBC Four
Programmes start at 7.00pm. [HD]
On air
05:30 AM - 11:30 AM
..programmes start at 7.00pm
152 minutes left
11:30 AM - 05:30 PM
..programmes start at 7.00pm
05:30 PM - 06:58 PM
..programmes start at 7.00pm
06:58 PM - 07:00 PM
This is BBC Four
Programmes start at 7.00pm. [HD]
07:00 PM - 07:30 PM
Great British Railway Journeys - S14 Ep14
14/15. Michael finds out about the impact of a famous Enoch Powell speech across the nation. [S,AD] [HD]
07:30 PM - 08:00 PM
Gareth Edwards's Great Welsh Adventure - S2 Ep1
1/5. Rugby legend Gareth Edwards and wife Maureen try steam trains and rallying in Machynlleth. [S] [HD]
08:00 PM - 09:00 PM
Brian Cox's Adventures in Space and Time - S1 Ep4
4/4. Brian explores the enigma of time - a phenomenon that we take for granted but which, as far as physicists are concerned, is one of the biggest mysteries in the universe. [S,AD] [HD]
09:00 PM - 10:00 PM
Tribe - S3 Ep4
4/6. Bruce Parry spends time with the Akie people of Tanzania, who live on the savannah. Contains some strong language. [S,AD]
10:00 PM - 10:15 PM
Derek Jacobi Remembers... Breaking the Code
Sir Derek Jacobi looks back on the 1997 BBC drama about mathematician Alan Turing. [S] [HD]
10:15 PM - 11:45 PM
Breaking the Code
Factual drama about Alan Turing, the mathematical genius who cracked the Enigma code. Deals with adult themes. [S]
11:45 PM - 12:45 AM
Castles: Britain's Fortified History - S1 Ep2
2/3. Sam Willis tells the story of the English ruler who left the most indelible mark on the castle, Edward I, as he turned it into an instrument of colonisation. [S,AD] [HD]