Bryan Singer directed X-Men and X-Men 2 before trading Marvel's stable of superheroes for Superman Returns. But now Singer's back in charge of the mutants, directing the upcoming X-Men: Days of Future Past, and on hand to walk viewers through the movie's sets and set pieces in a series of short featurettes.

X-Men: Days of Future Past is set to be a crossover piece, splicing elements of Singer's original films with continuing storylines from 2011's X-Men: First Class by virtue of a time-travel conceit. It's interesting — and useful to those who haven't checked in on the X-Men for a few years — to have the director outline the movie's main themes, locations, and characters, but beware: the six videos below contain spoilers.