Daily TV & radio guide - Saturday

Private Passions (12 noon R3). Philosopher A.C. Grayling with his choice of music.
The Lord Lieutenants (3.30 R4). First of four programmes in which Richard Stilgoe looks at the history and current role of lord-lieutenant (every English, Welsh and Scottish county has one).
People's Century Weekend (from 4.30 UK Horizons, also Sunday from 4.30). Over two days, re-runs of ten episodes from the excellent BBC tv history-from-below series that combined ordinary people's memories with archive film. Today's episodes cover the landmark years of 1900, 1914, 1919, 1933 and 1939; tomorrow's are all on post-Second World War themes.
The 1940s House (6.00 C4). Repeat of episode two. On Thursday (9.00 C4), episode three has the guinea-pig family experiencing food and fuel rationing.
Agenda: Arthur C. Clarke (6.30 World Service, repeated Sunday 6.30 am). The guru of Sri Lanka talks about robots, the future of technology, etc. More from Sir Arthur at the Open University on Thursday night.
Kumbh Mela: The Greatest Show on Earth (7.00 C4). An explanatory documentary launching C4's coverage of the once-every-12-years Hindu festival (also daily from Monday, 7.50 C4, and discussed on Monday's Night Waves , 9.30 R3).
Beautiful But Deadly (8.00 R4). Film femmes fatales.
» The Greeks (8.10 BBC2). First seen on BBC Knowledge last July, this three-part series begins by concentrating on the coming of democracy to Athens and the crucial role of Cleisthenes, but also has short digressions about Sparta, the Olympic Games, the importance of Homer and so on. Made in 1999 for showing on US television, it is nevertheless full of UK experts.