The actors are good enough with some comic relief and a few bad haircuts. The plot meanders a bit like the train in question and unfortunately, you're literally left in the dark, as most of the key action takes place at night with very low lighting and poor visibility. Its a strain on the eyes to follow what's going on (and funfairs are supposed to be brightly lit places) . I don't get this trend of dark movies, honestly. Whodunits should keep you engaged and guessing with the plot and not obscure events throughout for a lack of light, to a point when you want to abandon the movie in frustration!