Mac speaks of the snakes disliking the smell of kerosene. Kerosene is used in a glass-chimneyed metal lamp, the device that Mac sprinkles the oil from is obviously a woven-wicker citronella-fueled candle-torch that is used for repelling insects.
The 8 minutes that Nicholas gives Mac and Murdoch to rescue the girl (he sets a digital countdown timer) or else she will be electrocuted actually takes 10 minutes and 7 seconds in real time.
Last seen, Murdoc had severely disfigured skin on one side of his face from terrible burns, and was walking around with a limp and mechanic sounds implying metal gears to a prosthetic leg (since the time or before the last time, he was presumed to have died from a fall, but obviously only damaged/lost a leg), yet he walks around fine and there are no sounds. And his face is far too perfect to have been corrected from the kind of burns he had.