Sobekneferu is the first queen in history that we have a bust for that includes a face.
When talking to his father, Sherlock mentions the disappearance of a solitary cyclist and an incident at the Priory School.
These are references to two canon short stories.
There may be a way to beat carbon dating. If you filter out the carbon-14 from a greenhouse, or pump in CO2 obtained by burning petroleum (very very old carbon), you could grow cotton or flax there, and make cloth from the fibers that might pass as ancient.
Johnny Lee Miller and James saito both starred in eli stone