When Officer Trigg sees Kruger speeding past, and sets out after him, his motorcycle has three headlights on. But just seconds later, before he catches up to Kruger, only two headlights are on. The next time we see him, still at night, none of the headlights are on.
Alice calls the younger maid "Marie". Egbert calls the older maid "Marie", but Phyllis calls her "Madge".