On the one hand we have evolutionary theory, which says that random mutation plus natural selection produces gradual change in populations of living organisms such that subsequent generations become progressively more suited to prevailing conditions, and these small changes accumulate to the big changes we see over geological time. Though the theory seems sound (and immensely elegant), I understand there are some stages in the process that science has yet to explain adequately.
Behe's tour is in conjunction with the newly announced Centre for Intelligent Design based in Scotland (where apparently school curricula have no prohibition on teaching ID or creationism in school science lessons).
Some useful resources related to ID:
British Centre for Science Education
(Image positions also tweaked.)