Matthew Macfadyen narrates the documentary 24 Hours On Earth, which is a 2 part series looking at the different effects of light on animals during a 24 hour day. The US was apparently lucky to see both parts of the series, which was shown on BBC America in March.
BBC in the UK has only shown the first part of the documentary and there has been no mention of when the second half of the series will be shown. A forum member wrote to the BBC and the reply came back that the BBC only commissioned one programme only!
24 Hours on Earth should be retitled 12 Hours in the UK.
Edit: someone was able to compare the 2 hour version shown in the US with the 1 hour version shown in the UK. It appears the UK is an edited version combining parts 1 and 2.