Monday
How Do They Do It? (FIVE, 19.30-20.00) This week, the engineering of the Thames Barrier, and methods of recycling paper.
The Sky At Night (BBC4, 19.30-20.00) The unpredictably scheduled astronomy show returns with a look at the LCross lunar impactor.
Life (BBC1, 21.00-22.00) Attenborough’s attention turns to fishes, apparently the most diverse bunch of backboned animals on the planet.
JLB: The Man Who Saw The Future (BBC4, 22.45-00.00) Documentary about John Logie Baird, inventor of the television.
Aping Evolution (Radio 4, 21.00-21.30) Steve Jones knocks down evolutionary psychology.

Tuesday
Horizon (BBC2, 21.00-22.00) Following scientists who are studying black holes.

Thursday
Material World (Radio 4, 16.30-17.00) Quentin Cooper looks at ‘DNA nano-machines’.
Leading Edge (Radio 4, 21.00-21.30) Geoff Watts talks to meteorite hunters.
Defying Gravity (BBC2, 21.00-21.45) Part four of the new sci-fi drama. Anyone seen it? Any good?