When examining the inside of the carriage with ultraviolet light, Murdoch tells Crabtree that one of the things that doesn't fluoresce under UV light is blood. This is false. The iron in heme fluoresces under UV light. It seems the writers later corrected their mistake. In season 6, episode 6 Murdoch uses the UV light again to read a word written in blood on red wallpaper and this time the blood fluoresces appropriately.
Previous entries in the series have moved the setting to 1896. Murdoch refers to the Ripper murders as having taken place seven years earlier. As the Ripper killings were committed in 1888, they were actually eight years earlier.