Expelled is a sub-Michael Moore "investigation" into the idea that North American academia is a vast conspiracy to silence a new scientific field called ID or intelligent design. The documentary alledges that various people have been victimised and lost their jobs because they dared to question orthodox views on evolution and followed the ID "hypothesis".
Let's be clear. ID is an attempt by US creationists to get round legal blocks to prevent religion being taught in science classes. Their "designer" is God. There is no science underpinning ID, only an attempt to rebrand creationism to trick legal rules.
The film is factually incorrect at the outset. The alledged "victims" did not lose jobs, either they continued to work or never had a job to lose in the first place. "Expelled Exposed", a website by the National Centre for Science Education has all the background on why the controversy in the film is totally manufactured and false.
Perhaps the worst thing in Expelled, certainly why it got a number of merciless critical maulings in the US, is a deliberate and disgusting attempt to link Darwin, evolution and scientists working today with Nazis and the Holocaust. This approach to an alledgedly scientific debate is beneath contempt.
Expelled largely failed in the US. It's only audience was hard-core fundamentalists with such myopia that they see all science as anti-religious thus are predisposed to agree with anything that attacks science, no matter how grubby the attack may be. Let's hope that the similar lunatic fringe in the UK is even smaller than it is in the US.