Daily TV & radio guide - Wednesday

A Short History of Darkness (3.45 R4). Final 15-minute exploration embraces dark matter, fears of the dark, etc. With new poems by Colette Bryce and Ruth Padel.
Thinking Allowed (4.00 R4). Laurie Taylor with Bethan Marshall on the effectiveness of English teachers
The Gold of El Dorado (6.00 History Channel).
Tomorrow's World (7.00 BBC1). New kinds of brain operation.
Leopard, Stealth Hunter (7.30 C5). The big cat in Africa.
Driving Mum Crazy (8.00 C5). A seven-year-old boy with attention deficit hyperactivity disorder. First in a new series about unruly children.
Twenty Minutes: Book of the Month (8.15 R3) is Barbara Lewalski's Life of John Milton .
Connect (9.00 R4). The new "front line" - of Europe's defences against diseases from the rest of the world.
Night Waves (9.30 R3). What do the new Christmas films, books and games reveal about changing attitudes to childhood?