Miracle Day: The New World - S4-E1
Factual error: When Rex is crossing the newer Severn Bridge (when still on the bridge) he sees paying kiosks. The kiosks for this bridge are in Wales, significantly after you have come off the bridge, and would not be in plain sight when you cross.
Answer: Several times during the episode, most notably at the beginning when the old grave is discovered, Tosh holds a devise that looks a great deal like the Sonic Screwdriver that she uses to determine the age of the skeleton. However, a search of Google images shows that it is not the same thing.
OneHappyHusky