Hokum but I enjoyed it all except the WWII London police car sirens which weren't fitted until 1963 when they also introduced the blue flashing beacons. They just had bells but like all science fiction fans I do tend to be obsessively pedantic. I was prepared to accept all the other minor errors but those police car bells are a sound of those times which transport me back in time which the film makers missed. I suspect that those not liking science fiction will find the plot difficult to follow and the continual time shifts confusing but the production isn't made for non science fiction fans so if this isn't your style, don't bother struggling with the plot. :-)
